diff --git a/src/gui/tray/MainWindow.qml b/src/gui/tray/MainWindow.qml
index 482f65ea88b39..69c99003f211f 100644
--- a/src/gui/tray/MainWindow.qml
+++ b/src/gui/tray/MainWindow.qml
@@ -143,7 +143,7 @@ ApplicationWindow {
             radius: Systray.useNormalWindow ? 0.0 : Style.trayWindowRadius
             border.width: Style.trayWindowBorderWidth
             border.color: palette.dark
-            color: palette.base
+            color: Style.colorWithoutTransparency(palette.base)
         }
 
         property int userIndex: 0
@@ -180,7 +180,7 @@ ApplicationWindow {
             radius: Systray.useNormalWindow ? 0.0 : Style.trayWindowRadius
             border.width: Style.trayWindowBorderWidth
             border.color: palette.dark
-            color: palette.base
+            color: Style.colorWithoutTransparency(palette.base)
         }
 
         property var folderAccountState: ({})
@@ -239,7 +239,7 @@ ApplicationWindow {
         clip: true
 
         radius: Systray.useNormalWindow ? 0.0 : Style.trayWindowRadius
-        color: palette.base
+        color: Style.colorWithoutTransparency(palette.base)
 
         Accessible.role: Accessible.Grouping
         Accessible.name: qsTr("Nextcloud desktop main dialog")
diff --git a/theme/Style/Style.qml b/theme/Style/Style.qml
index 014fa5a07690f..03c7bf932fcd7 100644
--- a/theme/Style/Style.qml
+++ b/theme/Style/Style.qml
@@ -200,4 +200,9 @@ QtObject {
     function variableSize(size) {
         return size * (1 + Math.min(pixelSize / 100, 1));
     }
+
+    // some platforms (e.g. Windows 11) have a transparency set on palette colours, this function removes that
+    function colorWithoutTransparency(color) {
+        return Qt.rgba(color.r, color.g, color.b, 1)
+    }
 }