diff --git a/src/platformtheme/khintssettings.cpp b/src/platformtheme/khintssettings.cpp
--- a/src/platformtheme/khintssettings.cpp
+++ b/src/platformtheme/khintssettings.cpp
@@ -268,6 +268,10 @@
 
     switch (type) {
     case PaletteChanged: {
+        // Don't change the palette if the application has a custom one set
+        if (!qApp->property("KDE_COLOR_SCHEME_PATH").toString().isEmpty()) {
+            break;
+        }
         loadPalettes();
 
         //QApplication::setPalette and QGuiApplication::setPalette are different functions