Index: sources/gui/qml/dialogs/headerbar/HeaderbarSettings.qml
===================================================================
diff -u -r69c86c57349b7d4a6ba47a801ba27b1c470fade5 -r78aa5e70b591b3544ff9d9e6b772fe07deaa2f0f
--- sources/gui/qml/dialogs/headerbar/HeaderbarSettings.qml	(.../HeaderbarSettings.qml)	(revision 69c86c57349b7d4a6ba47a801ba27b1c470fade5)
+++ sources/gui/qml/dialogs/headerbar/HeaderbarSettings.qml	(.../HeaderbarSettings.qml)	(revision 78aa5e70b591b3544ff9d9e6b772fe07deaa2f0f)
@@ -35,6 +35,18 @@
 
             onValueChanged  : vAdjustmentAlarmVolume.doAdjustment( slider.value )
         }
+
+        BaseSwitch  { id: _darkMode
+            source          : Colors.darkMode ? "qrc:/images/iMoon" : "qrc:/images/iSun"
+            checked         : Colors.darkMode
+            activeColor     : "#2C4F77"
+            inactiveColor   : "#F5DDB0"
+            knobColor       : Colors.darkMode ? "#1A344D" : "#FDB635"
+
+            onClicked: {
+                Colors.darkMode =  ! Colors.darkMode
+            }
+        }
     }
 
     Connections { target: vAdjustmentAlarmVolume