diff --git a/usermods/usermod_rotary_brightness_color/usermod_rotary_brightness_color.h b/usermods/usermod_rotary_brightness_color/usermod_rotary_brightness_color.h
index 85a9a1605..c3e1ce17b 100644
--- a/usermods/usermod_rotary_brightness_color/usermod_rotary_brightness_color.h
+++ b/usermods/usermod_rotary_brightness_color/usermod_rotary_brightness_color.h
@@ -95,9 +95,9 @@ public:
           }
           else
           {
-            fastled_col.red = col[0];
-            fastled_col.green = col[1];
-            fastled_col.blue = col[2];
+            fastled_col.red = colPri[0];
+            fastled_col.green = colPri[1];
+            fastled_col.blue = colPri[2];
             prim_hsv = rgb2hsv_approximate(fastled_col);
             new_val = (int16_t)prim_hsv.h + fadeAmount;
             if (new_val > 255)
@@ -106,9 +106,9 @@ public:
               new_val += 255; // roll-over if smaller than 0
             prim_hsv.h = (byte)new_val;
             hsv2rgb_rainbow(prim_hsv, fastled_col);
-            col[0] = fastled_col.red;
-            col[1] = fastled_col.green;
-            col[2] = fastled_col.blue;
+            colPri[0] = fastled_col.red;
+            colPri[1] = fastled_col.green;
+            colPri[2] = fastled_col.blue;
           }
         }
         else if (Enc_B == LOW)
@@ -120,9 +120,9 @@ public:
           }
           else
           {
-            fastled_col.red = col[0];
-            fastled_col.green = col[1];
-            fastled_col.blue = col[2];
+            fastled_col.red = colPri[0];
+            fastled_col.green = colPri[1];
+            fastled_col.blue = colPri[2];
             prim_hsv = rgb2hsv_approximate(fastled_col);
             new_val = (int16_t)prim_hsv.h - fadeAmount;
             if (new_val > 255)
@@ -131,9 +131,9 @@ public:
               new_val += 255; // roll-over if smaller than 0
             prim_hsv.h = (byte)new_val;
             hsv2rgb_rainbow(prim_hsv, fastled_col);
-            col[0] = fastled_col.red;
-            col[1] = fastled_col.green;
-            col[2] = fastled_col.blue;
+            colPri[0] = fastled_col.red;
+            colPri[1] = fastled_col.green;
+            colPri[2] = fastled_col.blue;
           }
         }
         //call for notifier -> 0: init 1: direct change 2: button 3: notification 4: nightlight 5: other (No notification)
diff --git a/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h b/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h
index 383c1193e..9533fa21b 100644
--- a/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h
+++ b/usermods/usermod_v2_rotary_encoder_ui_ALT/usermod_v2_rotary_encoder_ui_ALT.h
@@ -518,7 +518,7 @@ void RotaryEncoderUIUsermod::setup()
 
   loopTime = millis();
 
-  currentCCT = (approximateKelvinFromRGB(RGBW32(col[0], col[1], col[2], col[3])) - 1900) >> 5;
+  currentCCT = (approximateKelvinFromRGB(RGBW32(colPri[0], colPri[1], colPri[2], colPri[3])) - 1900) >> 5;
 
   if (!initDone) sortModesAndPalettes();
 
@@ -920,17 +920,17 @@ void RotaryEncoderUIUsermod::changeHue(bool increase){
   display->updateRedrawTime();
 #endif
   currentHue1 = max(min((increase ? currentHue1+fadeAmount : currentHue1-fadeAmount), 255), 0);
-  colorHStoRGB(currentHue1*256, currentSat1, col);
+  colorHStoRGB(currentHue1*256, currentSat1, colPri);
   stateChanged = true; 
   if (applyToAll) {
     for (unsigned i=0; i<strip.getSegmentsNum(); i++) {
       Segment& seg = strip.getSegment(i);
       if (!seg.isActive()) continue;
-      seg.colors[0] = RGBW32(col[0], col[1], col[2], col[3]);
+      seg.colors[0] = RGBW32(colPri[0], colPri[1], colPri[2], colPri[3]);
     }
   } else {
     Segment& seg = strip.getSegment(strip.getMainSegmentId());
-    seg.colors[0] = RGBW32(col[0], col[1], col[2], col[3]);
+    seg.colors[0] = RGBW32(colPri[0], colPri[1], colPri[2], colPri[3]);
   }
   lampUdated();
 #ifdef USERMOD_FOUR_LINE_DISPLAY
@@ -950,16 +950,16 @@ void RotaryEncoderUIUsermod::changeSat(bool increase){
   display->updateRedrawTime();
 #endif
   currentSat1 = max(min((increase ? currentSat1+fadeAmount : currentSat1-fadeAmount), 255), 0);
-  colorHStoRGB(currentHue1*256, currentSat1, col);
+  colorHStoRGB(currentHue1*256, currentSat1, colPri);
   if (applyToAll) {
     for (unsigned i=0; i<strip.getSegmentsNum(); i++) {
       Segment& seg = strip.getSegment(i);
       if (!seg.isActive()) continue;
-      seg.colors[0] = RGBW32(col[0], col[1], col[2], col[3]);
+      seg.colors[0] = RGBW32(colPri[0], colPri[1], colPri[2], colPri[3]);
     }
   } else {
     Segment& seg = strip.getSegment(strip.getMainSegmentId());
-    seg.colors[0] = RGBW32(col[0], col[1], col[2], col[3]);
+    seg.colors[0] = RGBW32(colPri[0], colPri[1], colPri[2], colPri[3]);
   }
   lampUdated();
 #ifdef USERMOD_FOUR_LINE_DISPLAY
diff --git a/wled00/button.cpp b/wled00/button.cpp
index a56b845f2..41b2141ce 100644
--- a/wled00/button.cpp
+++ b/wled00/button.cpp
@@ -40,7 +40,7 @@ void longPressAction(uint8_t b)
 {
   if (!macroLongPress[b]) {
     switch (b) {
-      case 0: setRandomColor(col); colorUpdated(CALL_MODE_BUTTON); break;
+      case 0: setRandomColor(colPri); colorUpdated(CALL_MODE_BUTTON); break;
       case 1: 
         if(buttonBriDirection) {
           if (bri == 255) break; // avoid unnecessary updates to brightness
@@ -230,7 +230,7 @@ void handleAnalog(uint8_t b)
       effectPalette = constrain(effectPalette, 0, strip.getPaletteCount()-1);  // map is allowed to "overshoot", so we need to contrain the result
     } else if (macroDoublePress[b] == 200) {
       // primary color, hue, full saturation
-      colorHStoRGB(aRead*256,255,col);
+      colorHStoRGB(aRead*256,255,colPri);
     } else {
       // otherwise use "double press" for segment selection
       Segment& seg = strip.getSegment(macroDoublePress[b]);
diff --git a/wled00/led.cpp b/wled00/led.cpp
index a3853f394..24419e5c6 100644
--- a/wled00/led.cpp
+++ b/wled00/led.cpp
@@ -9,10 +9,10 @@ void setValuesFromFirstSelectedSeg() { setValuesFromSegment(strip.getFirstSelect
 void setValuesFromSegment(uint8_t s)
 {
   Segment& seg = strip.getSegment(s);
-  col[0] = R(seg.colors[0]);
-  col[1] = G(seg.colors[0]);
-  col[2] = B(seg.colors[0]);
-  col[3] = W(seg.colors[0]);
+  colPri[0] = R(seg.colors[0]);
+  colPri[1] = G(seg.colors[0]);
+  colPri[2] = B(seg.colors[0]);
+  colPri[3] = W(seg.colors[0]);
   colSec[0] = R(seg.colors[1]);
   colSec[1] = G(seg.colors[1]);
   colSec[2] = B(seg.colors[1]);
@@ -39,7 +39,7 @@ void applyValuesToSelectedSegs()
     if (effectIntensity != selsegPrev.intensity) {seg.intensity = effectIntensity; stateChanged = true;}
     if (effectPalette   != selsegPrev.palette)   {seg.setPalette(effectPalette);}
     if (effectCurrent   != selsegPrev.mode)      {seg.setMode(effectCurrent);}
-    uint32_t col0 = RGBW32(   col[0],    col[1],    col[2],    col[3]);
+    uint32_t col0 = RGBW32(colPri[0], colPri[1], colPri[2], colPri[3]);
     uint32_t col1 = RGBW32(colSec[0], colSec[1], colSec[2], colSec[3]);
     if (col0 != selsegPrev.colors[0])            {seg.setColor(0, col0);}
     if (col1 != selsegPrev.colors[1])            {seg.setColor(1, col1);}
@@ -164,7 +164,7 @@ void updateInterfaces(uint8_t callMode)
   #ifndef WLED_DISABLE_ALEXA
   if (espalexaDevice != nullptr && callMode != CALL_MODE_ALEXA) {
     espalexaDevice->setValue(bri);
-    espalexaDevice->setColor(col[0], col[1], col[2]);
+    espalexaDevice->setColor(colPri[0], colPri[1], colPri[2]);
   }
   #endif
   #ifndef WLED_DISABLE_MQTT
@@ -221,7 +221,7 @@ void handleNightlight()
       nightlightDelayMs = (unsigned)(nightlightDelayMins*60000);
       nightlightActiveOld = true;
       briNlT = bri;
-      for (unsigned i=0; i<4; i++) colNlT[i] = col[i]; // remember starting color
+      for (unsigned i=0; i<4; i++) colNlT[i] = colPri[i]; // remember starting color
       if (nightlightMode == NL_MODE_SUN)
       {
         //save current
@@ -246,7 +246,7 @@ void handleNightlight()
       bri = briNlT + ((nightlightTargetBri - briNlT)*nper);
       if (nightlightMode == NL_MODE_COLORFADE)                                         // color fading only is enabled with "NF=2"
       {
-        for (unsigned i=0; i<4; i++) col[i] = colNlT[i]+ ((colSec[i] - colNlT[i])*nper);   // fading from actual color to secondary color
+        for (unsigned i=0; i<4; i++) colPri[i] = colNlT[i]+ ((colSec[i] - colNlT[i])*nper);   // fading from actual color to secondary color
       }
       colorUpdated(CALL_MODE_NO_NOTIFY);
     }
diff --git a/wled00/mqtt.cpp b/wled00/mqtt.cpp
index a476db87a..8aa996640 100644
--- a/wled00/mqtt.cpp
+++ b/wled00/mqtt.cpp
@@ -99,7 +99,7 @@ static void onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProp
   //Prefix is stripped from the topic at this point
 
   if (strcmp_P(topic, PSTR("/col")) == 0) {
-    colorFromDecOrHexString(col, payloadStr);
+    colorFromDecOrHexString(colPri, payloadStr);
     colorUpdated(CALL_MODE_DIRECT_CHANGE);
   } else if (strcmp_P(topic, PSTR("/api")) == 0) {
     if (requestJSONBufferLock(15)) {
@@ -165,7 +165,7 @@ void publishMqtt()
   strcat_P(subuf, PSTR("/g"));
   mqtt->publish(subuf, 0, retainMqttMsg, s);         // optionally retain message (#2263)
 
-  sprintf_P(s, PSTR("#%06X"), (col[3] << 24) | (col[0] << 16) | (col[1] << 8) | (col[2]));
+  sprintf_P(s, PSTR("#%06X"), (colPri[3] << 24) | (colPri[0] << 16) | (colPri[1] << 8) | (colPri[2]));
   strlcpy(subuf, mqttDeviceTopic, 33);
   strcat_P(subuf, PSTR("/c"));
   mqtt->publish(subuf, 0, retainMqttMsg, s);         // optionally retain message (#2263)
diff --git a/wled00/set.cpp b/wled00/set.cpp
index 4c7349f84..f04d84e65 100644
--- a/wled00/set.cpp
+++ b/wled00/set.cpp
@@ -1185,7 +1185,7 @@ bool handleSet(AsyncWebServerRequest *request, const String& req, bool apply)
   }
   // you can add more if you need
 
-  // global col[], effectCurrent, ... are updated in stateChanged()
+  // global colPri[], effectCurrent, ... are updated in stateChanged()
   if (!apply) return true; // when called by JSON API, do not call colorUpdated() here
 
   pos = req.indexOf(F("&NN")); //do not send UDP notifications this time
diff --git a/wled00/wled.cpp b/wled00/wled.cpp
index 7b57b1dac..c5f3387e4 100644
--- a/wled00/wled.cpp
+++ b/wled00/wled.cpp
@@ -540,11 +540,12 @@ void WLED::beginStrip()
   } else {
     // fix for #3196
     if (bootPreset > 0) {
-      bool oldTransition = fadeTransition;    // workaround if transitions are enabled
-      fadeTransition = false;                 // ignore transitions temporarily
-      strip.setColor(0, BLACK);               // set all segments black
-      fadeTransition = oldTransition;         // restore transitions
-      col[0] = col[1] = col[2] = col[3] = 0;  // needed for colorUpdated()
+      // set all segments black (no transition)
+      for (unsigned i = 0; i < strip.getSegmentsNum(); i++) {
+        Segment &seg = strip.getSegment(i);
+        if (seg.isActive()) seg.colors[0] = BLACK;
+      }
+      colPri[0] = colPri[1] = colPri[2] = colPri[3] = 0;  // needed for colorUpdated()
     }
     briLast = briS; bri = 0;
     strip.fill(BLACK);
diff --git a/wled00/wled.h b/wled00/wled.h
index a00103481..9459080e8 100644
--- a/wled00/wled.h
+++ b/wled00/wled.h
@@ -407,7 +407,7 @@ WLED_GLOBAL bool gammaCorrectCol    _INIT(true);  // use gamma correction on col
 WLED_GLOBAL bool gammaCorrectBri    _INIT(false); // use gamma correction on brightness
 WLED_GLOBAL float gammaCorrectVal   _INIT(2.8f);  // gamma correction value
 
-WLED_GLOBAL byte col[]    _INIT_N(({ 255, 160, 0, 0 }));  // current RGB(W) primary color. col[] should be updated if you want to change the color.
+WLED_GLOBAL byte colPri[] _INIT_N(({ 255, 160, 0, 0 }));  // current RGB(W) primary color. colPri[] should be updated if you want to change the color.
 WLED_GLOBAL byte colSec[] _INIT_N(({ 0, 0, 0, 0 }));      // current RGB(W) secondary color
 
 WLED_GLOBAL byte nightlightTargetBri _INIT(0);      // brightness after nightlight is over
diff --git a/wled00/xml.cpp b/wled00/xml.cpp
index 2a8f29210..228cd1c86 100644
--- a/wled00/xml.cpp
+++ b/wled00/xml.cpp
@@ -11,7 +11,7 @@ void XML_response(Print& dest)
   dest.printf_P(PSTR("<?xml version=\"1.0\" ?><vs><ac>%d</ac>"), (nightlightActive && nightlightMode > NL_MODE_SET) ? briT : bri);
   for (int i = 0; i < 3; i++)
   {
-   dest.printf_P(PSTR("<cl>%d</cl>"), col[i]);
+   dest.printf_P(PSTR("<cl>%d</cl>"), colPri[i]);
   }
   for (int i = 0; i < 3; i++)
   {
@@ -20,7 +20,7 @@ void XML_response(Print& dest)
   dest.printf_P(PSTR("<ns>%d</ns><nr>%d</nr><nl>%d</nl><nf>%d</nf><nd>%d</nd><nt>%d</nt><fx>%d</fx><sx>%d</sx><ix>%d</ix><fp>%d</fp><wv>%d</wv><ws>%d</ws><ps>%d</ps><cy>%d</cy><ds>%s%s</ds><ss>%d</ss></vs>"),
     notifyDirect, receiveGroups!=0, nightlightActive, nightlightMode > NL_MODE_SET, nightlightDelayMins,
     nightlightTargetBri, effectCurrent, effectSpeed, effectIntensity, effectPalette,
-    strip.hasWhiteChannel() ? col[3] : -1, colSec[3], currentPreset, currentPlaylist >= 0,
+    strip.hasWhiteChannel() ? colPri[3] : -1, colSec[3], currentPreset, currentPlaylist >= 0,
     serverDescription, realtimeMode ? PSTR(" (live)") : "",
     strip.getFirstSelectedSegId()
   );