diff --git a/examples/companion_radio/ui-new/UITask.cpp b/examples/companion_radio/ui-new/UITask.cpp
index a26dc19a..09903db0 100644
--- a/examples/companion_radio/ui-new/UITask.cpp
+++ b/examples/companion_radio/ui-new/UITask.cpp
@@ -53,23 +53,24 @@ public:
 
   int render(DisplayDriver& display) override {
     // meshcore logo
-    display.setColor(DisplayDriver::BLUE);
+    display.setColor(UIColor::corp_blue);
     int logoWidth = 128;
     display.drawXbm((display.width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
     // meshcore website
     const char* website = "https://meshcore.io";
-    display.setColor(DisplayDriver::LIGHT);
+    display.setColor(UIColor::primary_txt);
     display.setTextSize(1);
     uint16_t websiteWidth = display.getTextWidth(website);
     display.setCursor((display.width() - websiteWidth) / 2, 22);
     display.print(website);
 
     // version info
-    display.setColor(DisplayDriver::LIGHT);
+    display.setColor(UIColor::primary_txt);
     display.setTextSize(1);
     display.drawTextCentered(display.width()/2, 35, _version_info);
 
+    display.setColor(UIColor::secondary_txt);
     display.setTextSize(1);
     display.drawTextCentered(display.width()/2, 48, FIRMWARE_BUILD_DATE);
 
@@ -128,7 +129,7 @@ class HomeScreen : public UIScreen {
     int iconHeight = 10;
     int iconX = display.width() - iconWidth - 5; // Position the icon near the top-right corner
     int iconY = 0;
-    display.setColor(DisplayDriver::GREEN);
+    display.setColor(UIColor::title_txt);
 
     // battery outline
     display.drawRect(iconX, iconY, iconWidth, iconHeight);
@@ -143,7 +144,7 @@ class HomeScreen : public UIScreen {
     // show muted icon if buzzer is muted
 #ifdef PIN_BUZZER
     if (_task->isBuzzerQuiet()) {
-      display.setColor(DisplayDriver::RED);
+      display.setColor(UIColor::warning_txt);
       display.drawXbm(iconX - 9, iconY + 1, muted_icon, 8, 8);
     }
 #endif
@@ -188,34 +189,37 @@ public:
   }
 
   int render(DisplayDriver& display) override {
+    display.setColor(UIColor::title_bkg);
+    display.fillRect(0, 0, display.width(), 12);
     char tmp[80];
     // node name
     display.setTextSize(1);
-    display.setColor(DisplayDriver::GREEN);
+    display.setColor(UIColor::title_txt);
     char filtered_name[sizeof(_node_prefs->node_name)];
     display.translateUTF8ToBlocks(filtered_name, _node_prefs->node_name, sizeof(filtered_name));
-    display.setCursor(0, 0);
+    display.setCursor(0, 2);
     display.print(filtered_name);
 
     // battery voltage
     renderBatteryIndicator(display, _task->getBattMilliVolts());
 
     // curr page indicator
+    display.setColor(UIColor::title_bkg);
     int y = 14;
     int x = display.width() / 2 - 5 * (HomePage::Count-1);
     for (uint8_t i = 0; i < HomePage::Count; i++, x += 10) {
       if (i == _page) {
-        display.fillRect(x-1, y-1, 3, 3);
+        display.fillRect(x-1, y-1, 4, 4);
       } else {
-        display.fillRect(x, y, 1, 1);
+        display.fillRect(x, y, 2, 2);
       }
     }
 
     if (_page == HomePage::FIRST) {
-      display.setColor(DisplayDriver::YELLOW);
+      display.setColor(UIColor::primary_txt);
       display.setTextSize(2);
       sprintf(tmp, "MSG: %d", _task->getMsgCount());
-      display.drawTextCentered(display.width() / 2, 20, tmp);
+      display.drawTextCentered(display.width() / 2, 22, tmp);
 
       #ifdef WIFI_SSID
         IPAddress ip = WiFi.localIP();
@@ -224,19 +228,19 @@ public:
         display.drawTextCentered(display.width() / 2, 54, tmp);
       #endif
       if (_task->hasConnection()) {
-        display.setColor(DisplayDriver::GREEN);
+        display.setColor(UIColor::warning_txt);
         display.setTextSize(1);
         display.drawTextCentered(display.width() / 2, 43, "< Connected >");
 
       } else if (the_mesh.getBLEPin() != 0) { // BT pin
-        display.setColor(DisplayDriver::RED);
+        display.setColor(UIColor::warning_txt);
         display.setTextSize(2);
         sprintf(tmp, "Pin:%d", the_mesh.getBLEPin());
         display.drawTextCentered(display.width() / 2, 43, tmp);
       }
     } else if (_page == HomePage::RECENT) {
       the_mesh.getRecentlyHeard(recent, UI_RECENT_LIST_SIZE);
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::primary_txt);
       int y = 20;
       for (int i = 0; i < UI_RECENT_LIST_SIZE; i++, y += 11) {
         auto a = &recent[i];
@@ -260,7 +264,7 @@ public:
         display.print(tmp);
       }
     } else if (_page == HomePage::RADIO) {
-      display.setColor(DisplayDriver::YELLOW);
+      display.setColor(UIColor::primary_txt);
       display.setTextSize(1);
       // freq / sf
       display.setCursor(0, 20);
@@ -279,15 +283,17 @@ public:
       sprintf(tmp, "Noise floor: %d", radio_driver.getNoiseFloor());
       display.print(tmp);
     } else if (_page == HomePage::BLUETOOTH) {
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::corp_blue);
       display.drawXbm((display.width() - 32) / 2, 18,
           _task->isSerialEnabled() ? bluetooth_on : bluetooth_off,
           32, 32);
+      display.setColor(UIColor::secondary_txt);
       display.setTextSize(1);
       display.drawTextCentered(display.width() / 2, 64 - 11, "toggle: " PRESS_LABEL);
     } else if (_page == HomePage::ADVERT) {
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::corp_blue);
       display.drawXbm((display.width() - 32) / 2, 18, advert_icon, 32, 32);
+      display.setColor(UIColor::secondary_txt);
       display.drawTextCentered(display.width() / 2, 64 - 11, "advert: " PRESS_LABEL);
 #if ENV_INCLUDE_GPS == 1
     } else if (_page == HomePage::GPS) {
@@ -305,24 +311,33 @@ public:
 #else
       strcpy(buf, gps_state ? "gps on" : "gps off");
 #endif
+      display.setColor(UIColor::primary_txt);
       display.drawTextLeftAlign(0, y, buf);
       if (nmea == NULL) {
         y = y + 12;
+        display.setColor(UIColor::secondary_txt);
         display.drawTextLeftAlign(0, y, "Can't access GPS");
       } else {
+        display.setColor(UIColor::primary_txt);
         strcpy(buf, nmea->isValid()?"fix":"no fix");
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 12;
+        display.setColor(UIColor::secondary_txt);
         display.drawTextLeftAlign(0, y, "sat");
+        display.setColor(UIColor::primary_txt);
         sprintf(buf, "%d", nmea->satellitesCount());
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 12;
+        display.setColor(UIColor::secondary_txt);
         display.drawTextLeftAlign(0, y, "pos");
+        display.setColor(UIColor::primary_txt);
         sprintf(buf, "%.4f %.4f",
           nmea->getLatitude()/1000000., nmea->getLongitude()/1000000.);
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 12;
+        display.setColor(UIColor::secondary_txt);
         display.drawTextLeftAlign(0, y, "alt");
+        display.setColor(UIColor::primary_txt);
         sprintf(buf, "%.2f", nmea->getAltitude()/1000.);
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 12;
@@ -390,7 +405,9 @@ public:
             strcpy(name, "unk"); sprintf(buf, "");
         }
         display.setCursor(0, y);
+        display.setColor(UIColor::secondary_txt);
         display.print(name);
+        display.setColor(UIColor::primary_txt);
         display.setCursor(
           display.width()-display.getTextWidth(buf)-1, y
         );
@@ -401,11 +418,13 @@ public:
       else sensors_scroll_offset = 0;
 #endif
     } else if (_page == HomePage::SHUTDOWN) {
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::corp_blue);
       display.setTextSize(1);
       if (_shutdown_init) {
+        display.setColor(UIColor::warning_txt);
         display.drawTextCentered(display.width() / 2, 34, "hibernating...");
       } else {
+        display.setColor(UIColor::secondary_txt);
         display.drawXbm((display.width() - 32) / 2, 18, power_icon, 32, 32);
         display.drawTextCentered(display.width() / 2, 64 - 11, "hibernate:" PRESS_LABEL);
       }
@@ -498,7 +517,7 @@ public:
     char tmp[16];
     display.setCursor(0, 0);
     display.setTextSize(1);
-    display.setColor(DisplayDriver::GREEN);
+    display.setColor(UIColor::corp_blue);
     sprintf(tmp, "Unread: %d", num_unread);
     display.print(tmp);
 
@@ -518,13 +537,13 @@ public:
     display.drawRect(0, 11, display.width(), 1);  // horiz line
 
     display.setCursor(0, 14);
-    display.setColor(DisplayDriver::YELLOW);
+    display.setColor(UIColor::secondary_txt);
     char filtered_origin[sizeof(p->origin)];
     display.translateUTF8ToBlocks(filtered_origin, p->origin, sizeof(filtered_origin));
     display.print(filtered_origin);
 
     display.setCursor(0, 25);
-    display.setColor(DisplayDriver::LIGHT);
+    display.setColor(UIColor::primary_txt);
     char filtered_msg[sizeof(p->msg)];
     display.translateUTF8ToBlocks(filtered_msg, p->msg, sizeof(filtered_msg));
     display.printWordWrap(filtered_msg, display.width());
@@ -806,9 +825,9 @@ void UITask::loop() {
         _display->setTextSize(1);
         int y = _display->height() / 3;
         int p = _display->height() / 32;
-        _display->setColor(DisplayDriver::DARK);
+        _display->setColor(UIColor::popup_bkg);
         _display->fillRect(p, y, _display->width() - p*2, y);
-        _display->setColor(DisplayDriver::LIGHT);  // draw box border
+        _display->setColor(UIColor::popup_txt);  // draw box border
         _display->drawRect(p, y, _display->width() - p*2, y);
         _display->drawTextCentered(_display->width() / 2, y + p*3, _alert);
         _next_refresh = _alert_expiry;   // will need refresh when alert is dismissed
@@ -845,7 +864,7 @@ void UITask::loop() {
         if (_display != NULL) {
           _display->startFrame();
           _display->setTextSize(2);
-          _display->setColor(DisplayDriver::RED);
+          _display->setColor(UIColor::warning_txt);
           _display->drawTextCentered(_display->width() / 2, 20, "Low Battery.");
           _display->drawTextCentered(_display->width() / 2, 40, "Shutting Down!");
           _display->endFrame();
diff --git a/examples/companion_radio/ui-orig/UITask.cpp b/examples/companion_radio/ui-orig/UITask.cpp
index b48f6412..09fc8e77 100644
--- a/examples/companion_radio/ui-orig/UITask.cpp
+++ b/examples/companion_radio/ui-orig/UITask.cpp
@@ -167,7 +167,7 @@ void UITask::renderBatteryIndicator(uint16_t batteryMilliVolts) {
   int iconHeight = 12;
   int iconX = _display->width() - iconWidth - 5; // Position the icon near the top-right corner
   int iconY = 0;
-  _display->setColor(DisplayDriver::GREEN);
+  _display->setColor(UIColor::primary_txt);
 
   // battery outline
   _display->drawRect(iconX, iconY, iconWidth, iconHeight);
@@ -188,7 +188,7 @@ void UITask::renderCurrScreen() {
     _display->setTextSize(1.4);
     uint16_t textWidth = _display->getTextWidth(_alert);
     _display->setCursor((_display->width() - textWidth) / 2, 22);
-    _display->setColor(DisplayDriver::GREEN);
+    _display->setColor(UIColor::warning_txt);
     _display->print(_alert);
     _alert[0] = 0;
     _need_refresh = true;
@@ -197,30 +197,29 @@ void UITask::renderCurrScreen() {
     // render message preview
     _display->setCursor(0, 0);
     _display->setTextSize(1);
-    _display->setColor(DisplayDriver::GREEN);
+    _display->setColor(UIColor::primary_txt);
     _display->print(_node_prefs->node_name);
 
     _display->setCursor(0, 12);
-    _display->setColor(DisplayDriver::YELLOW);
+    _display->setColor(UIColor::secondary_txt);
     _display->print(_origin);
     _display->setCursor(0, 24);
-    _display->setColor(DisplayDriver::LIGHT);
     _display->print(_msg);
 
     _display->setCursor(_display->width() - 28, 9);
     _display->setTextSize(2);
-    _display->setColor(DisplayDriver::ORANGE);
+    _display->setColor(UIColor::primary_txt);
     sprintf(tmp, "%d", _msgcount);
     _display->print(tmp);
-    _display->setColor(DisplayDriver::YELLOW); // last color will be kept on T114
+    _display->setColor(UIColor::secondary_txt); // last color will be kept on T114
   } else if ((millis() - ui_started_at) < BOOT_SCREEN_MILLIS) { // boot screen
     // meshcore logo
-    _display->setColor(DisplayDriver::BLUE);
+    _display->setColor(UIColor::corp_blue);
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
     // version info
-    _display->setColor(DisplayDriver::LIGHT);
+    _display->setColor(UIColor::primary_txt);
     _display->setTextSize(1);
     uint16_t textWidth = _display->getTextWidth(_version_info);
     _display->setCursor((_display->width() - textWidth) / 2, 22);
@@ -229,7 +228,7 @@ void UITask::renderCurrScreen() {
     // node name
     _display->setCursor(0, 0);
     _display->setTextSize(1);
-    _display->setColor(DisplayDriver::GREEN);
+    _display->setColor(UIColor::primary_txt);
     _display->print(_node_prefs->node_name);
 
     // battery voltage
@@ -237,7 +236,7 @@ void UITask::renderCurrScreen() {
 
     // freq / sf
     _display->setCursor(0, 20);
-    _display->setColor(DisplayDriver::YELLOW);
+    _display->setColor(UIColor::secondary_txt);
     sprintf(tmp, "FREQ: %06.3f SF%d", _node_prefs->freq, _node_prefs->sf);
     _display->print(tmp);
 
@@ -248,14 +247,14 @@ void UITask::renderCurrScreen() {
 
     // BT pin
     if (!_connected && the_mesh.getBLEPin() != 0) {
-      _display->setColor(DisplayDriver::RED);
+      _display->setColor(UIColor::warning_txt);
       _display->setTextSize(2);
       _display->setCursor(0, 43);
       sprintf(tmp, "Pin:%d", the_mesh.getBLEPin());
       _display->print(tmp);
-      _display->setColor(DisplayDriver::GREEN);
+      _display->setColor(UIColor::primary_txt);
     } else {
-      _display->setColor(DisplayDriver::LIGHT); 
+      _display->setColor(UIColor::primary_txt); 
     }
   }
   _need_refresh = false;
diff --git a/examples/companion_radio/ui-tiny/ScrollingStatusBar.h b/examples/companion_radio/ui-tiny/ScrollingStatusBar.h
index f5943c9b..9967489f 100644
--- a/examples/companion_radio/ui-tiny/ScrollingStatusBar.h
+++ b/examples/companion_radio/ui-tiny/ScrollingStatusBar.h
@@ -104,7 +104,7 @@ public:
     if (_status[0] == 0) return;
 
     display.setTextSize(1);
-    display.setColor(DisplayDriver::GREEN);
+    display.setColor(UIColor::primary_txt);
 
     // if (_needs_redraw) {
     //   _text_width = display.getTextWidth(_status);
diff --git a/examples/companion_radio/ui-tiny/UITask.cpp b/examples/companion_radio/ui-tiny/UITask.cpp
index 452c02d4..5b9ebfd3 100644
--- a/examples/companion_radio/ui-tiny/UITask.cpp
+++ b/examples/companion_radio/ui-tiny/UITask.cpp
@@ -56,24 +56,24 @@ public:
   int render(DisplayDriver& display) override {
     if (millis() < version_after) {
     // meshcore logo
-    display.setColor(DisplayDriver::BLUE);
+    display.setColor(UIColor::corp_blue);
     int logoWidth = 72;
     display.drawXbm(0, 0, meshcore_logo, 72, 36);
     } else {
 
     // meshcore website
     const char* website = "meshcore.io";
-    display.setColor(DisplayDriver::LIGHT);
+    display.setColor(UIColor::primary_txt);
     display.setTextSize(1);
     uint16_t websiteWidth = display.getTextWidth(website);
     display.setCursor((display.width() - websiteWidth) / 2, 9);
     display.print(website);
 
     // version info
-    display.setColor(DisplayDriver::LIGHT);
     display.setTextSize(1);
     display.drawTextCentered(display.width()/2, 18, _version_info);
 
+    display.setColor(UIColor::secondary_txt);
     display.setTextSize(1);
     display.drawTextCentered(display.width()/2, 27, FIRMWARE_BUILD_DATE);
     }
@@ -163,7 +163,7 @@ public:
       // display.print(filtered_name);
 
 
-      display.setColor(DisplayDriver::YELLOW);
+      display.setColor(UIColor::primary_txt);
       display.setTextSize(2);
       sprintf(tmp, "MSG: %d", _task->getMsgCount());
       display.setCursor(0, 10);
@@ -180,19 +180,19 @@ public:
         display.drawTextCentered(display.width() / 2, 54, tmp);
       #endif
       if (_task->hasConnection()) {
-        display.setColor(DisplayDriver::GREEN);
+        display.setColor(UIColor::warning_txt);
         display.setTextSize(1);
         display.drawTextCentered(display.width() / 2, display.height()-8, "< Connected >");
 
       } else if (the_mesh.getBLEPin() != 0) { // BT pin
-        display.setColor(DisplayDriver::RED);
+        display.setColor(UIColor::warning_txt);
         display.setTextSize(2);
         sprintf(tmp, "Pin:%d", the_mesh.getBLEPin());
         display.drawTextCentered(display.width() / 2, display.height()-8, tmp);
       }
     } else if (_page == HomePage::RECENT) {
       the_mesh.getRecentlyHeard(recent, UI_RECENT_LIST_SIZE);
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::primary_txt);
       int y = 8;
       for (int i = 0; i < UI_RECENT_LIST_SIZE; i++, y += 11) {
         auto a = &recent[i];
@@ -216,7 +216,7 @@ public:
         display.print(tmp);
       }
     } else if (_page == HomePage::RADIO) {
-      display.setColor(DisplayDriver::YELLOW);
+      display.setColor(UIColor::primary_txt);
       display.setTextSize(1);
       // frequency and spreading factor
       display.setCursor(0, 8);
@@ -238,14 +238,14 @@ public:
       display.drawTextRightAlign(display.width(), 26, tmp);
 
     } else if (_page == HomePage::BLUETOOTH) {
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::corp_blue);
       display.drawXbm((display.width() - 32) / 2, 8,
           _task->isSerialEnabled() ? bluetooth_on : bluetooth_off,
           32, 32);
       display.setTextSize(1);
       // display.drawTextCentered(display.width() / 2, 40 - 11, "toggle: " PRESS_LABEL);
     } else if (_page == HomePage::ADVERT) {
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::corp_blue);
       display.drawXbm((display.width() - 32) / 2, 8, advert_icon, 32, 32);
       // display.drawTextCentered(display.width() / 2, 40 - 11, "advert: " PRESS_LABEL);
 #if ENV_INCLUDE_GPS == 1
@@ -264,9 +264,11 @@ public:
 #else
       strcpy(buf, gps_state ? "gps on" : "gps off");
 #endif
+      display.setColor(UIColor::primary_txt);
       display.drawTextLeftAlign(0, y, buf);
       if (nmea == NULL) {
         // y = y + 8;
+        display.setColor(UIColor::warning_txt);
         display.drawTextLeftAlign(0, y, "Can't access GPS");
       } else {
         if (!gps_state || !nmea->isValid()) {
@@ -274,6 +276,7 @@ public:
         } else {
             sprintf(buf, "%d sat", nmea->satellitesCount());
         }
+        display.setColor(UIColor::primary_txt);
         display.drawTextRightAlign(display.width()-1, y, buf);
         y = y + 8;
         sprintf(buf, "lat %.4f",
@@ -349,8 +352,10 @@ public:
             r.skipData(type);
             strcpy(name, "unk"); sprintf(buf, "");
         }
+        display.setColor(UIColor::secondary_txt);
         display.setCursor(0, y);
         display.print(name);
+        display.setColor(UIColor::primary_txt);
         display.setCursor(
           display.width()-display.getTextWidth(buf)-1, y
         );
@@ -361,7 +366,7 @@ public:
       else sensors_scroll_offset = 0;
 #endif
     } else if (_page == HomePage::SHUTDOWN) {
-      display.setColor(DisplayDriver::GREEN);
+      display.setColor(UIColor::secondary_txt);
       display.setTextSize(1);
       if (_shutdown_init) {
         display.drawTextCentered(display.width() / 2, 20, "hibernating...");
@@ -692,9 +697,9 @@ void UITask::loop() {
         _display->setTextSize(1);
         int y = _display->height() / 3;
         int p = _display->height() / 32;
-        _display->setColor(DisplayDriver::DARK);
+        _display->setColor(UIColor::popup_bkg);
         _display->fillRect(p, y, _display->width() - p*2, y);
-        _display->setColor(DisplayDriver::LIGHT);  // draw box border
+        _display->setColor(UIColor::popup_txt);  // draw box border
         _display->drawRect(p, y, _display->width() - p*2, y);
         _display->drawTextCentered(_display->width() / 2, y + p*3, _alert);
         _next_refresh = _alert_expiry;   // will need refresh when alert is dismissed
diff --git a/examples/simple_repeater/UITask.cpp b/examples/simple_repeater/UITask.cpp
index 6751aad6..e7225557 100644
--- a/examples/simple_repeater/UITask.cpp
+++ b/examples/simple_repeater/UITask.cpp
@@ -57,18 +57,17 @@ void UITask::renderCurrScreen() {
   char tmp[80];
   if (millis() < _started_at + BOOT_SCREEN_MILLIS) { // boot screen
     // meshcore logo
-    _display->setColor(DisplayDriver::BLUE);
+    _display->setColor(UIColor::corp_blue);
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
     // meshcore website
     const char* website = "https://meshcore.io";
-    _display->setColor(DisplayDriver::LIGHT);
+    _display->setColor(UIColor::primary_txt);
     _display->setTextSize(1);
     _display->drawTextCentered(_display->width() / 2, 22, website);
 
     // version info
-    _display->setColor(DisplayDriver::LIGHT);
     _display->setTextSize(1);
     _display->drawTextCentered(_display->width() / 2, 35, _version_info);
 
@@ -77,13 +76,13 @@ void UITask::renderCurrScreen() {
     _display->drawTextCentered(_display->width() / 2, 48, node_type);
   } else if (_powering_off_at > 0) {
     // meshcore logo
-    _display->setColor(DisplayDriver::BLUE);
+    _display->setColor(UIColor::corp_blue);
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
     // meshcore website
     const char* website = "https://meshcore.io";
-    _display->setColor(DisplayDriver::LIGHT);
+    _display->setColor(UIColor::primary_txt);
     _display->setTextSize(1);
     _display->drawTextCentered(_display->width()/ 2, 22, website);
 
@@ -95,12 +94,11 @@ void UITask::renderCurrScreen() {
   } else {
     _display->setCursor(0, 0);
     _display->setTextSize(1);
-    _display->setColor(DisplayDriver::GREEN);
+    _display->setColor(UIColor::primary_txt);
     _display->print(_node_prefs->node_name);
 
     // freq / sf
     _display->setCursor(0, 20);
-    _display->setColor(DisplayDriver::YELLOW);
     sprintf(tmp, "FREQ: %06.3f SF%d", _node_prefs->freq, _node_prefs->sf);
     _display->print(tmp);
 
diff --git a/examples/simple_room_server/UITask.cpp b/examples/simple_room_server/UITask.cpp
index fb66b819..8e4c2fcf 100644
--- a/examples/simple_room_server/UITask.cpp
+++ b/examples/simple_room_server/UITask.cpp
@@ -49,20 +49,19 @@ void UITask::renderCurrScreen() {
   char tmp[80];
   if (millis() < BOOT_SCREEN_MILLIS) { // boot screen
     // meshcore logo
-    _display->setColor(DisplayDriver::BLUE);
+    _display->setColor(UIColor::corp_blue);
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
     // meshcore website
     const char* website = "https://meshcore.io";
-    _display->setColor(DisplayDriver::LIGHT);
+    _display->setColor(UIColor::primary_txt);
     _display->setTextSize(1);
     uint16_t websiteWidth = _display->getTextWidth(website);
     _display->setCursor((_display->width() - websiteWidth) / 2, 22);
     _display->print(website);
 
     // version info
-    _display->setColor(DisplayDriver::LIGHT);
     _display->setTextSize(1);
     uint16_t versionWidth = _display->getTextWidth(_version_info);
     _display->setCursor((_display->width() - versionWidth) / 2, 35);
@@ -77,12 +76,11 @@ void UITask::renderCurrScreen() {
     // node name
     _display->setCursor(0, 0);
     _display->setTextSize(1);
-    _display->setColor(DisplayDriver::GREEN);
+    _display->setColor(UIColor::primary_txt);
     _display->print(_node_prefs->node_name);
 
     // freq / sf
     _display->setCursor(0, 20);
-    _display->setColor(DisplayDriver::YELLOW);
     sprintf(tmp, "FREQ: %06.3f SF%d", _node_prefs->freq, _node_prefs->sf);
     _display->print(tmp);
 
diff --git a/examples/simple_sensor/UITask.cpp b/examples/simple_sensor/UITask.cpp
index 68a80607..75a0b465 100644
--- a/examples/simple_sensor/UITask.cpp
+++ b/examples/simple_sensor/UITask.cpp
@@ -49,20 +49,19 @@ void UITask::renderCurrScreen() {
   char tmp[80];
   if (millis() < BOOT_SCREEN_MILLIS) { // boot screen
     // meshcore logo
-    _display->setColor(DisplayDriver::BLUE);
+    _display->setColor(UIColor::corp_blue);
     int logoWidth = 128;
     _display->drawXbm((_display->width() - logoWidth) / 2, 3, meshcore_logo, logoWidth, 13);
 
     // meshcore website
     const char* website = "https://meshcore.io";
-    _display->setColor(DisplayDriver::LIGHT);
+    _display->setColor(UIColor::primary_txt);
     _display->setTextSize(1);
     uint16_t websiteWidth = _display->getTextWidth(website);
     _display->setCursor((_display->width() - websiteWidth) / 2, 22);
     _display->print(website);
 
     // version info
-    _display->setColor(DisplayDriver::LIGHT);
     _display->setTextSize(1);
     uint16_t versionWidth = _display->getTextWidth(_version_info);
     _display->setCursor((_display->width() - versionWidth) / 2, 35);
@@ -77,12 +76,11 @@ void UITask::renderCurrScreen() {
     // node name
     _display->setCursor(0, 0);
     _display->setTextSize(1);
-    _display->setColor(DisplayDriver::GREEN);
+    _display->setColor(UIColor::primary_txt);
     _display->print(_node_prefs->node_name);
 
     // freq / sf
     _display->setCursor(0, 20);
-    _display->setColor(DisplayDriver::YELLOW);
     sprintf(tmp, "FREQ: %06.3f SF%d", _node_prefs->freq, _node_prefs->sf);
     _display->print(tmp);
 
diff --git a/src/helpers/ui/DisplayDriver.h b/src/helpers/ui/DisplayDriver.h
index dcc5fe03..b76a1b6c 100644
--- a/src/helpers/ui/DisplayDriver.h
+++ b/src/helpers/ui/DisplayDriver.h
@@ -3,12 +3,20 @@
 #include <stdint.h>
 #include <string.h>
 
+using ColorVal = uint16_t;
+
+class UIColor {
+public:
+  // color definitions (by element _type_)
+  static ColorVal window_bkg, title_bkg, title_txt, primary_txt, secondary_txt, warning_txt, popup_bkg, popup_txt, corp_blue;
+};
+
 class DisplayDriver {
   int _w, _h;
 protected:
   DisplayDriver(int w, int h) { _w = w; _h = h; }
 public:
-  enum Color { DARK=0, LIGHT, RED, GREEN, BLUE, YELLOW, ORANGE }; // on b/w screen, colors will be !=0 synonym of light
+  //enum Color { DARK=0, LIGHT, RED, GREEN, BLUE, YELLOW, ORANGE }; // on b/w screen, colors will be !=0 synonym of light
 
   int width() const { return _w; }
   int height() const { return _h; }
@@ -18,9 +26,9 @@ public:
   virtual void turnOn() = 0;
   virtual void turnOff() = 0;
   virtual void clear() = 0;
-  virtual void startFrame(Color bkg = DARK) = 0;
+  virtual void startFrame(ColorVal bkg = UIColor::window_bkg) = 0;
   virtual void setTextSize(int sz) = 0;
-  virtual void setColor(Color c) = 0;
+  virtual void setColor(ColorVal c) = 0;
   virtual void setCursor(int x, int y) = 0;
   virtual void print(const char* str) = 0;
   virtual void printWordWrap(const char* str, int max_width) { print(str); }   // fallback to basic print() if no override
diff --git a/src/helpers/ui/E213Display.cpp b/src/helpers/ui/E213Display.cpp
index 814693a0..ab742976 100644
--- a/src/helpers/ui/E213Display.cpp
+++ b/src/helpers/ui/E213Display.cpp
@@ -2,6 +2,17 @@
 
 #include "../../MeshCore.h"
 
+// Color scheme
+ColorVal UIColor::window_bkg = WHITE;
+ColorVal UIColor::title_bkg = BLACK;
+ColorVal UIColor::title_txt = WHITE;
+ColorVal UIColor::primary_txt = BLACK;
+ColorVal UIColor::secondary_txt = BLACK;
+ColorVal UIColor::warning_txt = BLACK;
+ColorVal UIColor::popup_bkg = BLACK;
+ColorVal UIColor::popup_txt = WHITE;
+ColorVal UIColor::corp_blue = BLACK;
+
 BaseDisplay* E213Display::detectEInk()
 {
     // Test 1: Logic of BUSY pin
@@ -108,16 +119,18 @@ void E213Display::clear() {
   display->clear();
 }
 
-void E213Display::startFrame(Color bkg) {
+void E213Display::startFrame(ColorVal bkg) {
   display_crc.reset();
 
   // Fill screen with white first to ensure clean background
   display->fillRect(0, 0, width(), height(), WHITE);
 
-  if (bkg == LIGHT) {
+  if (bkg == 0) {
     // Fill with black if light background requested (inverted for e-ink)
     display->fillRect(0, 0, width(), height(), BLACK);
   }
+  _color = UIColor::primary_txt;
+  display->setTextColor(_color);
 }
 
 void E213Display::setTextSize(int sz) {
@@ -126,9 +139,10 @@ void E213Display::setTextSize(int sz) {
     display->setTextSize(sz);
 }
 
-void E213Display::setColor(Color c) {
-  display_crc.update<Color>(c);
-  // implemented in individual display methods
+void E213Display::setColor(ColorVal c) {
+  _color = c;
+  display_crc.update<ColorVal>(c);
+  display->setTextColor(_color);
 }
 
 void E213Display::setCursor(int x, int y) {
@@ -147,7 +161,7 @@ void E213Display::fillRect(int x, int y, int w, int h) {
   display_crc.update<int>(y);
   display_crc.update<int>(w);
   display_crc.update<int>(h);
-    display->fillRect(x, y, w, h, BLACK);
+    display->fillRect(x, y, w, h, _color);
 }
 
 void E213Display::drawRect(int x, int y, int w, int h) {
@@ -155,7 +169,7 @@ void E213Display::drawRect(int x, int y, int w, int h) {
   display_crc.update<int>(y);
   display_crc.update<int>(w);
   display_crc.update<int>(h);
-    display->drawRect(x, y, w, h, BLACK);
+    display->drawRect(x, y, w, h, _color);
 }
 
 void E213Display::drawXbm(int x, int y, const uint8_t *bits, int w, int h) {
@@ -179,7 +193,7 @@ void E213Display::drawXbm(int x, int y, const uint8_t *bits, int w, int h) {
 
       // If the bit is set, draw the pixel
       if (bitSet) {
-          display->drawPixel(x + bx, y + by, BLACK);
+          display->drawPixel(x + bx, y + by, _color);
       }
     }
   }
diff --git a/src/helpers/ui/E213Display.h b/src/helpers/ui/E213Display.h
index add8f11b..32567a79 100644
--- a/src/helpers/ui/E213Display.h
+++ b/src/helpers/ui/E213Display.h
@@ -16,6 +16,7 @@ class E213Display : public DisplayDriver {
   RefCountedDigitalPin* _periph_power;
   CRC32 display_crc;
   uint32_t last_display_crc_value = 0;
+  uint16_t _color;
 
 public:
   E213Display(RefCountedDigitalPin* periph_power = NULL) : DisplayDriver(250, 122), _periph_power(periph_power) {}
@@ -30,9 +31,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char *str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/E290Display.cpp b/src/helpers/ui/E290Display.cpp
index ef4df05e..ddb449f4 100644
--- a/src/helpers/ui/E290Display.cpp
+++ b/src/helpers/ui/E290Display.cpp
@@ -2,6 +2,17 @@
 
 #include "../../MeshCore.h"
 
+// Color scheme
+ColorVal UIColor::window_bkg = WHITE;
+ColorVal UIColor::title_bkg = BLACK;
+ColorVal UIColor::title_txt = WHITE;
+ColorVal UIColor::primary_txt = BLACK;
+ColorVal UIColor::secondary_txt = BLACK;
+ColorVal UIColor::warning_txt = BLACK;
+ColorVal UIColor::popup_bkg = BLACK;
+ColorVal UIColor::popup_txt = WHITE;
+ColorVal UIColor::corp_blue = BLACK;
+
 bool E290Display::begin() {
   if (_init) return true;
 
@@ -62,15 +73,17 @@ void E290Display::clear() {
   display.clear();
 }
 
-void E290Display::startFrame(Color bkg) {
+void E290Display::startFrame(ColorVal bkg) {
   display_crc.reset();
 
   // Fill screen with white first to ensure clean background
   display.fillRect(0, 0, width(), height(), WHITE);
-  if (bkg == LIGHT) {
+  if (bkg == 0) {
     // Fill with black if light background requested (inverted for e-ink)
     display.fillRect(0, 0, width(), height(), BLACK);
   }
+  _color = UIColor::primary_txt;
+  display.setTextColor(_color);
 }
 
 void E290Display::setTextSize(int sz) {
@@ -79,9 +92,10 @@ void E290Display::setTextSize(int sz) {
   display.setTextSize(sz);
 }
 
-void E290Display::setColor(Color c) {
-  display_crc.update<Color>(c);
-  // implemented in individual display methods
+void E290Display::setColor(ColorVal c) {
+  _color = c;
+  display_crc.update<ColorVal>(c);
+  display.setTextColor(_color);
 }
 
 void E290Display::setCursor(int x, int y) {
@@ -100,7 +114,7 @@ void E290Display::fillRect(int x, int y, int w, int h) {
   display_crc.update<int>(y);
   display_crc.update<int>(w);
   display_crc.update<int>(h);
-  display.fillRect(x, y, w, h, BLACK);
+  display.fillRect(x, y, w, h, _color);
 }
 
 void E290Display::drawRect(int x, int y, int w, int h) {
@@ -108,7 +122,7 @@ void E290Display::drawRect(int x, int y, int w, int h) {
   display_crc.update<int>(y);
   display_crc.update<int>(w);
   display_crc.update<int>(h);
-  display.drawRect(x, y, w, h, BLACK);
+  display.drawRect(x, y, w, h, _color);
 }
 
 void E290Display::drawXbm(int x, int y, const uint8_t *bits, int w, int h) {
@@ -132,7 +146,7 @@ void E290Display::drawXbm(int x, int y, const uint8_t *bits, int w, int h) {
 
       // If the bit is set, draw the pixel
       if (bitSet) {
-        display.drawPixel(x + bx, y + by, BLACK);
+        display.drawPixel(x + bx, y + by, _color);
       }
     }
   }
diff --git a/src/helpers/ui/E290Display.h b/src/helpers/ui/E290Display.h
index 88bf34ff..bf6296bb 100644
--- a/src/helpers/ui/E290Display.h
+++ b/src/helpers/ui/E290Display.h
@@ -16,6 +16,7 @@ class E290Display : public DisplayDriver {
   RefCountedDigitalPin* _periph_power;
   CRC32 display_crc;
   uint32_t last_display_crc_value = 0;
+  uint16_t _color;
 
 public:
   E290Display(RefCountedDigitalPin* periph_power = NULL) : DisplayDriver(296, 128), _periph_power(periph_power) {}
@@ -26,9 +27,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char *str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/GxEPDDisplay.cpp b/src/helpers/ui/GxEPDDisplay.cpp
index ad47754b..0a5f6a55 100644
--- a/src/helpers/ui/GxEPDDisplay.cpp
+++ b/src/helpers/ui/GxEPDDisplay.cpp
@@ -14,6 +14,18 @@
   SPIClass SPI1 = SPIClass(FSPI);
 #endif
 
+// Color scheme
+ColorVal UIColor::window_bkg = GxEPD_WHITE;
+ColorVal UIColor::title_bkg = GxEPD_BLACK;
+ColorVal UIColor::title_txt = GxEPD_WHITE;
+ColorVal UIColor::primary_txt = GxEPD_BLACK;
+ColorVal UIColor::secondary_txt = GxEPD_BLACK;
+ColorVal UIColor::warning_txt = GxEPD_BLACK;
+ColorVal UIColor::popup_bkg = GxEPD_BLACK;
+ColorVal UIColor::popup_txt = GxEPD_WHITE;
+ColorVal UIColor::corp_blue = GxEPD_BLACK;
+
+
 bool GxEPDDisplay::begin() {
   display.epd2.selectSPI(SPI1, SPISettings(4000000, MSBFIRST, SPI_MODE0));
 #ifdef ESP32
@@ -61,9 +73,9 @@ void GxEPDDisplay::clear() {
   display_crc.reset();
 }
 
-void GxEPDDisplay::startFrame(Color bkg) {
-  display.fillScreen(GxEPD_WHITE);
-  display.setTextColor(_curr_color = GxEPD_BLACK);
+void GxEPDDisplay::startFrame(ColorVal bkg) {
+  display.fillScreen(bkg);
+  display.setTextColor(_curr_color = UIColor::primary_txt);
   display_crc.reset();
 }
 
@@ -85,14 +97,9 @@ void GxEPDDisplay::setTextSize(int sz) {
   }
 }
 
-void GxEPDDisplay::setColor(Color c) {
-  display_crc.update<Color> (c);
-  // colours need to be inverted for epaper displays
-  if (c == DARK) {
-    display.setTextColor(_curr_color = GxEPD_WHITE);
-  } else {
-    display.setTextColor(_curr_color = GxEPD_BLACK);
-  }
+void GxEPDDisplay::setColor(ColorVal c) {
+  display_crc.update<ColorVal> (c);
+  display.setTextColor(_curr_color = c);
 }
 
 void GxEPDDisplay::setCursor(int x, int y) {
diff --git a/src/helpers/ui/GxEPDDisplay.h b/src/helpers/ui/GxEPDDisplay.h
index 219b6076..c653eac4 100644
--- a/src/helpers/ui/GxEPDDisplay.h
+++ b/src/helpers/ui/GxEPDDisplay.h
@@ -51,9 +51,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char* str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/LGFXDisplay.cpp b/src/helpers/ui/LGFXDisplay.cpp
index a53cbc62..7bdd52a2 100644
--- a/src/helpers/ui/LGFXDisplay.cpp
+++ b/src/helpers/ui/LGFXDisplay.cpp
@@ -1,5 +1,16 @@
 #include "LGFXDisplay.h"
 
+// Color scheme
+ColorVal UIColor::window_bkg = 0xFFFF;
+ColorVal UIColor::title_bkg = 0x001F;
+ColorVal UIColor::title_txt = 0xFFFF;
+ColorVal UIColor::primary_txt = 0x0000;
+ColorVal UIColor::secondary_txt = (18 << 11) | (36 << 5) | 18;  // mid-gray
+ColorVal UIColor::warning_txt = 0xFD20;
+ColorVal UIColor::popup_bkg =  0x07FF;  // CYAN
+ColorVal UIColor::popup_txt = 0x0000;
+ColorVal UIColor::corp_blue = 0x001A;
+
 bool LGFXDisplay::begin() {
   turnOn();
   display->init();
@@ -35,45 +46,20 @@ void LGFXDisplay::clear() {
   buffer.clearDisplay();
 }
 
-void LGFXDisplay::startFrame(Color bkg) {
+void LGFXDisplay::startFrame(ColorVal bkg) {
 //  display->startWrite();
 //  display->getScanLine();
-  buffer.clearDisplay();
-  buffer.setTextColor(TFT_WHITE);
+  _color = bkg;
+  buffer.fillScreen(_color);
+  buffer.setTextColor(_color = UIColor::primary_txt);
 }
 
 void LGFXDisplay::setTextSize(int sz) {
   buffer.setTextSize(sz);
 }
 
-void LGFXDisplay::setColor(Color c) {
-  // _color = (c != 0) ? ILI9342_WHITE : ILI9342_BLACK;
-  switch (c) {
-    case DARK:
-      _color = TFT_BLACK;
-      break;
-    case LIGHT:
-      _color = TFT_WHITE;
-      break;
-    case RED:
-      _color = TFT_RED;
-      break;
-    case GREEN:
-      _color = TFT_GREEN;
-      break;
-    case BLUE:
-      _color = TFT_BLUE;
-      break;
-    case YELLOW:
-      _color = TFT_YELLOW;
-      break;
-    case ORANGE:
-      _color = TFT_ORANGE;
-      break;
-    default:
-      _color = TFT_WHITE;
-  }
-  buffer.setTextColor(_color);
+void LGFXDisplay::setColor(ColorVal c) {
+  buffer.setTextColor(_color = c);
 }
 
 void LGFXDisplay::setCursor(int x, int y) {
diff --git a/src/helpers/ui/LGFXDisplay.h b/src/helpers/ui/LGFXDisplay.h
index ad7212ec..a2d660b2 100644
--- a/src/helpers/ui/LGFXDisplay.h
+++ b/src/helpers/ui/LGFXDisplay.h
@@ -25,9 +25,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char* str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/NV3001BDisplay.cpp b/src/helpers/ui/NV3001BDisplay.cpp
index 03825cc0..1ff7765c 100644
--- a/src/helpers/ui/NV3001BDisplay.cpp
+++ b/src/helpers/ui/NV3001BDisplay.cpp
@@ -96,18 +96,16 @@
   #define NV3001B_TEXT_SIZE2_SCALE_Y 3
 #endif
 
-static uint16_t mapColor(DisplayDriver::Color c) {
-  switch (c) {
-    case DisplayDriver::DARK: return 0x0000;
-    case DisplayDriver::LIGHT: return 0xffff;
-    case DisplayDriver::RED: return 0xf800;
-    case DisplayDriver::GREEN: return 0x07e0;
-    case DisplayDriver::BLUE: return 0x001f;
-    case DisplayDriver::YELLOW: return 0xffe0;
-    case DisplayDriver::ORANGE: return 0xfd20;
-    default: return 0xffff;
-  }
-}
+// Color scheme
+ColorVal UIColor::window_bkg = 0xFFFF;
+ColorVal UIColor::title_bkg = 0x001F;
+ColorVal UIColor::title_txt = 0xFFFF;
+ColorVal UIColor::primary_txt = 0x0000;
+ColorVal UIColor::secondary_txt = (18 << 11) | (36 << 5) | 18;  // mid-gray
+ColorVal UIColor::warning_txt = 0xFD20;
+ColorVal UIColor::popup_bkg =  0x07FF;  // CYAN
+ColorVal UIColor::popup_txt = 0x0000;
+ColorVal UIColor::corp_blue = 0x001A;
 
 static int scaleX(int x) {
   return (int)(x * DISPLAY_SCALE_X);
@@ -465,15 +463,15 @@ void NV3001BDisplay::turnOff() {
 
 void NV3001BDisplay::clear() {
   uint16_t saved = color;
-  color = 0x0000;
+  color = UIColor::window_bkg;
   fillPhysicalRect(0, 0, NV3001B_SCREEN_WIDTH, NV3001B_SCREEN_HEIGHT);
   color = saved;
 }
 
-void NV3001BDisplay::startFrame(Color bkg) {
-  color = mapColor(bkg);
+void NV3001BDisplay::startFrame(ColorVal bkg) {
+  color = bkg;
   fillPhysicalRect(0, 0, NV3001B_SCREEN_WIDTH, NV3001B_SCREEN_HEIGHT);
-  color = 0xffff;
+  color = UIColor::primary_txt;
   text_size = 1;
   cursor_x = 0;
   cursor_y = 0;
@@ -483,8 +481,8 @@ void NV3001BDisplay::setTextSize(int sz) {
   text_size = sz < 1 ? 1 : sz;
 }
 
-void NV3001BDisplay::setColor(Color c) {
-  color = mapColor(c);
+void NV3001BDisplay::setColor(ColorVal c) {
+  color = c;
 }
 
 void NV3001BDisplay::setCursor(int x, int y) {
diff --git a/src/helpers/ui/NV3001BDisplay.h b/src/helpers/ui/NV3001BDisplay.h
index 98cdaae8..76505b5d 100644
--- a/src/helpers/ui/NV3001BDisplay.h
+++ b/src/helpers/ui/NV3001BDisplay.h
@@ -55,9 +55,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char* str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/NullDisplayDriver.h b/src/helpers/ui/NullDisplayDriver.h
index 2a9670bd..ff214c88 100644
--- a/src/helpers/ui/NullDisplayDriver.h
+++ b/src/helpers/ui/NullDisplayDriver.h
@@ -11,9 +11,9 @@ public:
   void turnOn() override { }
   void turnOff() override { }
   void clear() override { }
-  void startFrame(Color bkg = DARK) override { }
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override { }
   void setTextSize(int sz) override { }
-  void setColor(Color c) override { }
+  void setColor(ColorVal c) override { }
   void setCursor(int x, int y) override { }
   void print(const char* str) override { }
   void fillRect(int x, int y, int w, int h) override { }
diff --git a/src/helpers/ui/SH1106Display.cpp b/src/helpers/ui/SH1106Display.cpp
index 57ccfc2e..aeb4f300 100644
--- a/src/helpers/ui/SH1106Display.cpp
+++ b/src/helpers/ui/SH1106Display.cpp
@@ -9,6 +9,17 @@ bool SH1106Display::i2c_probe(TwoWire &wire, uint8_t addr)
   return (error == 0);
 }
 
+// Color scheme
+ColorVal UIColor::window_bkg = SH110X_BLACK;
+ColorVal UIColor::title_bkg = SH110X_WHITE;
+ColorVal UIColor::title_txt = SH110X_BLACK;
+ColorVal UIColor::primary_txt = SH110X_WHITE;
+ColorVal UIColor::secondary_txt = SH110X_WHITE;
+ColorVal UIColor::warning_txt = SH110X_WHITE;
+ColorVal UIColor::popup_bkg = SH110X_WHITE;
+ColorVal UIColor::popup_txt = SH110X_BLACK;
+ColorVal UIColor::corp_blue = SH110X_WHITE;
+
 bool SH1106Display::begin()
 {
   // Wire must already be initialised by board.begin() before this is called.
@@ -35,7 +46,7 @@ void SH1106Display::clear()
   display.display();
 }
 
-void SH1106Display::startFrame(Color bkg)
+void SH1106Display::startFrame(ColorVal bkg)
 {
   display.clearDisplay(); // TODO: apply 'bkg'
   _color = SH110X_WHITE;
@@ -49,9 +60,9 @@ void SH1106Display::setTextSize(int sz)
   display.setTextSize(sz);
 }
 
-void SH1106Display::setColor(Color c)
+void SH1106Display::setColor(ColorVal c)
 {
-  _color = (c != 0) ? SH110X_WHITE : SH110X_BLACK;
+  _color = c;
   display.setTextColor(_color);
 }
 
@@ -77,7 +88,7 @@ void SH1106Display::drawRect(int x, int y, int w, int h)
 
 void SH1106Display::drawXbm(int x, int y, const uint8_t *bits, int w, int h)
 {
-  display.drawBitmap(x, y, bits, w, h, SH110X_WHITE);
+  display.drawBitmap(x, y, bits, w, h, _color);
 }
 
 uint16_t SH1106Display::getTextWidth(const char *str)
diff --git a/src/helpers/ui/SH1106Display.h b/src/helpers/ui/SH1106Display.h
index b52a6adf..4e269d5e 100644
--- a/src/helpers/ui/SH1106Display.h
+++ b/src/helpers/ui/SH1106Display.h
@@ -30,9 +30,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char *str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/SSD1306Display.cpp b/src/helpers/ui/SSD1306Display.cpp
index 464b2642..9b858071 100644
--- a/src/helpers/ui/SSD1306Display.cpp
+++ b/src/helpers/ui/SSD1306Display.cpp
@@ -6,6 +6,17 @@ bool SSD1306Display::i2c_probe(TwoWire& wire, uint8_t addr) {
   return (error == 0);
 }
 
+// Color scheme
+ColorVal UIColor::window_bkg = SSD1306_BLACK;
+ColorVal UIColor::title_bkg = SSD1306_WHITE;
+ColorVal UIColor::title_txt = SSD1306_BLACK;
+ColorVal UIColor::primary_txt = SSD1306_WHITE;
+ColorVal UIColor::secondary_txt = SSD1306_WHITE;
+ColorVal UIColor::warning_txt = SSD1306_WHITE;
+ColorVal UIColor::popup_bkg = SSD1306_WHITE;
+ColorVal UIColor::popup_txt = SSD1306_BLACK;
+ColorVal UIColor::corp_blue = SSD1306_WHITE;
+
 bool SSD1306Display::begin() {
   if (!_isOn) {
     if (_peripher_power) _peripher_power->claim();
@@ -44,7 +55,7 @@ void SSD1306Display::clear() {
   display.display();
 }
 
-void SSD1306Display::startFrame(Color bkg) {
+void SSD1306Display::startFrame(ColorVal bkg) {
   display.clearDisplay();  // TODO: apply 'bkg'
   _color = SSD1306_WHITE;
   display.setTextColor(_color);
@@ -56,8 +67,8 @@ void SSD1306Display::setTextSize(int sz) {
   display.setTextSize(sz);
 }
 
-void SSD1306Display::setColor(Color c) {
-  _color = (c != 0) ? SSD1306_WHITE : SSD1306_BLACK;
+void SSD1306Display::setColor(ColorVal c) {
+  _color = c;
   display.setTextColor(_color);
 }
 
@@ -78,7 +89,7 @@ void SSD1306Display::drawRect(int x, int y, int w, int h) {
 }
 
 void SSD1306Display::drawXbm(int x, int y, const uint8_t* bits, int w, int h) {
-  display.drawBitmap(x, y, bits, w, h, SSD1306_WHITE);
+  display.drawBitmap(x, y, bits, w, h, _color);
 }
 
 uint16_t SSD1306Display::getTextWidth(const char* str) {
diff --git a/src/helpers/ui/SSD1306Display.h b/src/helpers/ui/SSD1306Display.h
index d843da85..5dabbc58 100644
--- a/src/helpers/ui/SSD1306Display.h
+++ b/src/helpers/ui/SSD1306Display.h
@@ -35,9 +35,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char* str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/ST7735Display.cpp b/src/helpers/ui/ST7735Display.cpp
index 905ff503..344f5b1d 100644
--- a/src/helpers/ui/ST7735Display.cpp
+++ b/src/helpers/ui/ST7735Display.cpp
@@ -417,6 +417,17 @@ bool ST7735Display::i2c_probe(TwoWire& wire, uint8_t addr) {
   #define PIN_TFT_LEDA_CTL_ACTIVE  HIGH
 #endif
 
+// Color scheme
+ColorVal UIColor::window_bkg = ST77XX_WHITE;
+ColorVal UIColor::title_bkg = ST77XX_BLUE;
+ColorVal UIColor::title_txt = ST77XX_WHITE;
+ColorVal UIColor::primary_txt = ST77XX_BLACK;
+ColorVal UIColor::secondary_txt = (18 << 11) | (36 << 5) | 18;  // mid-gray
+ColorVal UIColor::warning_txt = ST77XX_ORANGE;
+ColorVal UIColor::popup_bkg = ST77XX_CYAN;
+ColorVal UIColor::popup_txt = ST77XX_BLACK;
+ColorVal UIColor::corp_blue = 0x001A;
+
 bool ST7735Display::begin() {
   if (!sprite) {
     // alloc offscreen canvas
@@ -527,9 +538,9 @@ void ST7735Display::clear() {
   sprite->fillScreen(ST77XX_BLACK);
 }
 
-void ST7735Display::startFrame(Color bkg) {
-  sprite->fillScreen(ST77XX_BLACK);
-  sprite->setTextColor(curr_color = ST77XX_WHITE);
+void ST7735Display::startFrame(ColorVal bkg) {
+  sprite->fillScreen(bkg);
+  sprite->setTextColor(curr_color = UIColor::primary_txt);
   sprite->setFreeFont();
   sprite->setTextSize(1);      // This one affects size of Please wait... message
   //sprite->cp437(true);         // Use full 256 char 'Code Page 437' font
@@ -539,33 +550,8 @@ void ST7735Display::setTextSize(int sz) {
   sprite->setTextSize(sz);
 }
 
-void ST7735Display::setColor(Color c) {
-  switch (c) {
-    case DisplayDriver::DARK :
-      curr_color = ST77XX_BLACK;
-      break;
-    case DisplayDriver::LIGHT : 
-      curr_color = ST77XX_WHITE;
-      break;
-    case DisplayDriver::RED : 
-      curr_color = ST77XX_RED;
-      break;
-    case DisplayDriver::GREEN : 
-      curr_color = ST77XX_GREEN;
-      break;
-    case DisplayDriver::BLUE : 
-      curr_color = ST77XX_BLUE;
-      break;
-    case DisplayDriver::YELLOW : 
-      curr_color = ST77XX_YELLOW;
-      break;
-    case DisplayDriver::ORANGE : 
-      curr_color = ST77XX_ORANGE;
-      break;
-    default:
-      curr_color = ST77XX_WHITE;
-      break;
-  }
+void ST7735Display::setColor(ColorVal c) {
+  curr_color = c;
   sprite->setTextColor(curr_color);
 }
 
diff --git a/src/helpers/ui/ST7735Display.h b/src/helpers/ui/ST7735Display.h
index 68c83db2..6e289b21 100644
--- a/src/helpers/ui/ST7735Display.h
+++ b/src/helpers/ui/ST7735Display.h
@@ -33,9 +33,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char* str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/ST7789Display.cpp b/src/helpers/ui/ST7789Display.cpp
index 98d69395..fad75194 100644
--- a/src/helpers/ui/ST7789Display.cpp
+++ b/src/helpers/ui/ST7789Display.cpp
@@ -26,6 +26,17 @@
   #define SCALE_Y DISPLAY_SCALE_Y
 #endif
 
+// Color scheme
+ColorVal UIColor::window_bkg = ST77XX_WHITE;
+ColorVal UIColor::title_bkg = ST77XX_BLUE;
+ColorVal UIColor::title_txt = ST77XX_WHITE;
+ColorVal UIColor::primary_txt = ST77XX_BLACK;
+ColorVal UIColor::secondary_txt = (18 << 11) | (36 << 5) | 18;  // mid-gray
+ColorVal UIColor::warning_txt = ST77XX_ORANGE;
+ColorVal UIColor::popup_bkg = ST77XX_CYAN;
+ColorVal UIColor::popup_txt = ST77XX_BLACK;
+ColorVal UIColor::corp_blue = 0x001A;
+
 bool ST7789Display::begin() {
   if(!_isOn) {
     pinMode(PIN_TFT_VDD_CTL, OUTPUT);
@@ -90,9 +101,9 @@ void ST7789Display::clear() {
   display.clear();
 }
 
-void ST7789Display::startFrame(Color bkg) {
-  display.clear();
-  _color = ST77XX_WHITE;
+void ST7789Display::startFrame(ColorVal bkg) {
+  display.fillRect(0, 0, display.width(), display.height());
+  _color = UIColor::primary_txt;
   display.setRGB(_color);
   display.setFont(ArialMT_Plain_16);
 }
@@ -110,38 +121,8 @@ void ST7789Display::setTextSize(int sz) {
   }
 }
 
-void ST7789Display::setColor(Color c) {
-  switch (c) {
-    case DisplayDriver::DARK :
-      _color = ST77XX_BLACK;
-      display.setColor(OLEDDISPLAY_COLOR::BLACK);
-      break;
-#if 0
-    case DisplayDriver::LIGHT : 
-      _color = ST77XX_WHITE;
-      break;
-    case DisplayDriver::RED : 
-      _color = ST77XX_RED;
-      break;
-    case DisplayDriver::GREEN : 
-      _color = ST77XX_GREEN;
-      break;
-    case DisplayDriver::BLUE : 
-      _color = ST77XX_BLUE;
-      break;
-    case DisplayDriver::YELLOW : 
-      _color = ST77XX_YELLOW;
-      break;
-    case DisplayDriver::ORANGE : 
-      _color = ST77XX_ORANGE;
-      break;
-#endif
-    default:
-      _color = ST77XX_WHITE;
-      display.setColor(OLEDDISPLAY_COLOR::WHITE);
-      break;
-  }
-  display.setRGB(_color);
+void ST7789Display::setColor(ColorVal c) {
+  display.setRGB(_color = c);
 }
 
 void ST7789Display::setCursor(int x, int y) {
diff --git a/src/helpers/ui/ST7789Display.h b/src/helpers/ui/ST7789Display.h
index 9822a67d..580ad463 100644
--- a/src/helpers/ui/ST7789Display.h
+++ b/src/helpers/ui/ST7789Display.h
@@ -27,9 +27,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char* str) override;
   void printWordWrap(const char* str, int max_width) override;
diff --git a/src/helpers/ui/ST7789LCDDisplay.cpp b/src/helpers/ui/ST7789LCDDisplay.cpp
index 7a02668b..a9f30dd5 100644
--- a/src/helpers/ui/ST7789LCDDisplay.cpp
+++ b/src/helpers/ui/ST7789LCDDisplay.cpp
@@ -23,6 +23,17 @@ bool ST7789LCDDisplay::i2c_probe(TwoWire& wire, uint8_t addr) {
   return true;
 }
 
+// Color scheme
+ColorVal UIColor::window_bkg = ST77XX_WHITE;
+ColorVal UIColor::title_bkg = ST77XX_BLUE;
+ColorVal UIColor::title_txt = ST77XX_WHITE;
+ColorVal UIColor::primary_txt = ST77XX_BLACK;
+ColorVal UIColor::secondary_txt = (18 << 11) | (36 << 5) | 18;  // mid-gray
+ColorVal UIColor::warning_txt = ST77XX_ORANGE;
+ColorVal UIColor::popup_bkg = ST77XX_CYAN;
+ColorVal UIColor::popup_txt = ST77XX_BLACK;
+ColorVal UIColor::corp_blue = 0x001A;
+
 bool ST7789LCDDisplay::begin() {
   if (!_isOn) {
     if (_peripher_power) _peripher_power->claim();
@@ -78,9 +89,9 @@ void ST7789LCDDisplay::clear() {
   display.fillScreen(ST77XX_BLACK);
 }
 
-void ST7789LCDDisplay::startFrame(Color bkg) {
-  display.fillScreen(ST77XX_BLACK);
-  display.setTextColor(ST77XX_WHITE);
+void ST7789LCDDisplay::startFrame(ColorVal bkg) {
+  display.fillScreen(bkg);
+  display.setTextColor(_color = UIColor::primary_txt);
   display.setTextSize(1 * DISPLAY_SCALE_X); // This one affects size of Please wait... message
   display.cp437(true); // Use full 256 char 'Code Page 437' font
 }
@@ -89,34 +100,8 @@ void ST7789LCDDisplay::setTextSize(int sz) {
   display.setTextSize(sz * DISPLAY_SCALE_X);
 }
 
-void ST7789LCDDisplay::setColor(Color c) {
-  switch (c) {
-    case DisplayDriver::DARK :
-      _color = ST77XX_BLACK;
-      break;
-    case DisplayDriver::LIGHT : 
-      _color = ST77XX_WHITE;
-      break;
-    case DisplayDriver::RED : 
-      _color = ST77XX_RED;
-      break;
-    case DisplayDriver::GREEN : 
-      _color = ST77XX_GREEN;
-      break;
-    case DisplayDriver::BLUE : 
-      _color = ST77XX_BLUE;
-      break;
-    case DisplayDriver::YELLOW : 
-      _color = ST77XX_YELLOW;
-      break;
-    case DisplayDriver::ORANGE : 
-      _color = ST77XX_ORANGE;
-      break;
-    default:
-      _color = ST77XX_WHITE;
-      break;
-  }
-  display.setTextColor(_color);
+void ST7789LCDDisplay::setColor(ColorVal c) {
+  display.setTextColor(_color = c);
 }
 
 void ST7789LCDDisplay::setCursor(int x, int y) {
diff --git a/src/helpers/ui/ST7789LCDDisplay.h b/src/helpers/ui/ST7789LCDDisplay.h
index 03a6d3f1..b5127d35 100644
--- a/src/helpers/ui/ST7789LCDDisplay.h
+++ b/src/helpers/ui/ST7789LCDDisplay.h
@@ -47,9 +47,9 @@ public:
   void turnOn() override;
   void turnOff() override;
   void clear() override;
-  void startFrame(Color bkg = DARK) override;
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override;
   void setTextSize(int sz) override;
-  void setColor(Color c) override;
+  void setColor(ColorVal c) override;
   void setCursor(int x, int y) override;
   void print(const char* str) override;
   void fillRect(int x, int y, int w, int h) override;
diff --git a/src/helpers/ui/U8g2Display.cpp b/src/helpers/ui/U8g2Display.cpp
new file mode 100644
index 00000000..72118a0e
--- /dev/null
+++ b/src/helpers/ui/U8g2Display.cpp
@@ -0,0 +1,12 @@
+#include "U8g2Display.h"
+
+// Color scheme
+ColorVal UIColor::window_bkg = 0;
+ColorVal UIColor::title_bkg = 1;
+ColorVal UIColor::title_txt = 0;
+ColorVal UIColor::primary_txt = 1;
+ColorVal UIColor::secondary_txt = 1;
+ColorVal UIColor::warning_txt = 1;
+ColorVal UIColor::popup_bkg = 1;
+ColorVal UIColor::popup_txt = 0;
+ColorVal UIColor::corp_blue = 1;
diff --git a/src/helpers/ui/U8g2Display.h b/src/helpers/ui/U8g2Display.h
index 73c58936..a87ee19b 100644
--- a/src/helpers/ui/U8g2Display.h
+++ b/src/helpers/ui/U8g2Display.h
@@ -72,10 +72,10 @@ public:
     _u8g2.sendBuffer();
   }
 
-  void startFrame(Color bkg = DARK) override {
-    _u8g2.clearBuffer();
-    _drawColor = 1;
-    _u8g2.setDrawColor(1);
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override {
+    _u8g2.clearBuffer();  // TODO: apply 'bkg' color
+    _drawColor = UIColor::primary_txt;
+    _u8g2.setDrawColor(_drawColor);
     applyFont(1);
   }
 
@@ -83,8 +83,8 @@ public:
     applyFont(sz);
   }
 
-  void setColor(Color c) override {
-    _drawColor = (c != DARK) ? 1 : 0;
+  void setColor(ColorVal c) override {
+    _drawColor = c;
     _u8g2.setDrawColor(_drawColor);
   }
 
@@ -94,22 +94,18 @@ public:
   }
 
   void print(const char* str) override {
-    _u8g2.setDrawColor(_drawColor);
     _u8g2.drawStr(_cursorX, _cursorY, str);
   }
 
   void fillRect(int x, int y, int w, int h) override {
-    _u8g2.setDrawColor(_drawColor);
     _u8g2.drawBox(x, y, w, h);
   }
 
   void drawRect(int x, int y, int w, int h) override {
-    _u8g2.setDrawColor(_drawColor);
     _u8g2.drawFrame(x, y, w, h);
   }
 
   void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override {
-    _u8g2.setDrawColor(1);
     _u8g2.drawXBM(x, y, w, h, bits);
   }
 
diff --git a/variants/lilygo_techo_card/platformio.ini b/variants/lilygo_techo_card/platformio.ini
index 07bcebfe..c7bb7378 100644
--- a/variants/lilygo_techo_card/platformio.ini
+++ b/variants/lilygo_techo_card/platformio.ini
@@ -23,7 +23,7 @@ build_src_filter = ${nrf52_base.build_src_filter}
   +<helpers/*.cpp>
   +<TechoCardBoard.cpp>
   +<helpers/sensors/EnvironmentSensorManager.cpp>
-  +<helpers/ui/U8g2Display.h>
+  +<helpers/ui/U8g2Display.cpp>
   +<helpers/ui/MomentaryButton.cpp>
   +<../variants/lilygo_techo_card>
 lib_deps =