diff --git a/core/modules/info/platform.js b/core/modules/info/platform.js
index 0eb0b9ea8..40b94081f 100644
--- a/core/modules/info/platform.js
+++ b/core/modules/info/platform.js
@@ -37,12 +37,14 @@ exports.getInfoTiddlerFields = function(updateInfoTiddlersCallback) {
 		infoTiddlerFields.push({title: "$:/info/browser/screen/width", text: window.screen.width.toString()});
 		infoTiddlerFields.push({title: "$:/info/browser/screen/height", text: window.screen.height.toString()});
  		// Dark mode through event listener on MediaQueryList
- 		var mqList = window.matchMedia("(prefers-color-scheme: dark)"),
- 			getDarkModeTiddler = function() {return {title: "$:/info/darkmode", text: mqList.matches ? "yes" : "no"};};
- 		infoTiddlerFields.push(getDarkModeTiddler());
- 		mqList.addListener(function(event) {
- 			updateInfoTiddlersCallback([getDarkModeTiddler()]);
- 		});
+		var mqList = window.matchMedia("(prefers-color-scheme: dark)"),
+			getDarkModeTiddler = function() {return {title: "$:/info/darkmode", text: mqList.matches ? "yes" : "no"};};
+		infoTiddlerFields.push(getDarkModeTiddler());
+		mqList.addEventListener("change", function(event){
+			updateInfoTiddlersCallback([getDarkModeTiddler()]);
+			// activate all actions tagged $:/tags/DarkLightChangeActions
+			$tw.rootWidget.invokeActionsByTag("$:/tags/DarkLightChangeActions",event,{"dark-mode":mqList.matches ? "yes" : "no"});
+		});
 		// Language
 		infoTiddlerFields.push({title: "$:/info/browser/language", text: navigator.language || ""});
 	}
diff --git a/editions/tw5.com/tiddlers/features/DarkLightChangeActions.tid b/editions/tw5.com/tiddlers/features/DarkLightChangeActions.tid
new file mode 100644
index 000000000..2ed502f44
--- /dev/null
+++ b/editions/tw5.com/tiddlers/features/DarkLightChangeActions.tid
@@ -0,0 +1,39 @@
+created: 20231101120147664
+modified: 20231101124455520
+tags: Features
+title: DarkLightChangeActions
+type: text/vnd.tiddlywiki
+
+<<.from-version "5.3.2">> Actions tagged <<tag "$:/tags/DarkLightChangeActions">> are executed whenever the browser or OS dark / light setting is changed.
+
+<<.tip """Be aware, that the browser setting can be independent from the OS setting.<br>
+
+If the browser settings are set to "System theme - auto" for ~FireFox or "System default" for Chrome-like browsers, the OS setting will be shown. """>>
+
+Also see [[SystemTag: $:/tags/DarkLightChangeActions]]
+
+!! Variables
+
+The following variable is defined for all actions DarkLightChangeActions
+
+| Variables | Description |h
+|`dark-mode` |`yes` or `no` depending on the browser or OS setting |
+
+!! Exmample
+
+The following example defines the $:/palette tiddler based on the dark / light mode setting. Palettes are tagged: <<tag "$:/tags/Palette">> <- This tag-pill dropdown can be used to see all possible palette tiddlers.
+
+```
+title: test-AutoSwitchPalette
+tags: $:/tags/DarkLightChangeActions
+
+\define darkPalette() $:/palettes/GruvboxDark
+\define lightPalette() $:/palettes/Vanilla
+
+<$action-setfield $tiddler="$:/palette" text={{{ [<dark-mode>match[yes]then<darkPalette>else<lightPalette>] }}} />
+```
+
+!! InfoMechanism
+
+<<.warning """The system info tiddler $:/info/darkmode will be dynamically updated ''after'' the actions have been executed. So it's important to use the variable `dark-mode`""">>
+
diff --git a/editions/tw5.com/tiddlers/systemtags/SystemTag_ $__tags_DarkLightChangeActions.tid b/editions/tw5.com/tiddlers/systemtags/SystemTag_ $__tags_DarkLightChangeActions.tid
new file mode 100644
index 000000000..41cd15fb3
--- /dev/null
+++ b/editions/tw5.com/tiddlers/systemtags/SystemTag_ $__tags_DarkLightChangeActions.tid	
@@ -0,0 +1,11 @@
+caption: $:/tags/DarkLightChangeActions
+created: 20231101115650094
+description: marks actions executed on dark / light mode changes
+modified: 20231101120653921
+tags: SystemTags
+title: SystemTag: $:/tags/DarkLightChangeActions
+
+The [[system tag|SystemTags]] `$:/tags/DarkLightChangeActions` marks actions executed on dark / light mode changes. 
+
+* <<.from-version "5.3.2">> DarkLightChangeActions
+* $:/info/darkmode