diff --git a/src/styles/org.kde.desktop/AbstractApplicationHeader.qml b/src/styles/org.kde.desktop/AbstractApplicationHeader.qml
--- a/src/styles/org.kde.desktop/AbstractApplicationHeader.qml
+++ b/src/styles/org.kde.desktop/AbstractApplicationHeader.qml
@@ -27,6 +27,10 @@
     Theme.inherit: true
 
     background: Rectangle {
+        // Always use window bg color for toolbar, even if the page
+        // it's located on uses a different color set
+        Theme.colorSet: Theme.Window
+        Theme.inherit: false
         color: Theme.backgroundColor
         Separator {
             visible: root.separatorVisible && (!root.page || !root.page.header || !root.page.header.visible || root.page.header.toString().indexOf("ToolBar") === -1)