diff --git a/bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/widgets/Display.java b/bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/widgets/Display.java
index 89dc03f..bf3c004 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/widgets/Display.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/cocoa/org/eclipse/swt/widgets/Display.java
@@ -4170,6 +4170,13 @@
 	}
 }
 
+/**
+ * Resets the cached alternateSelectedControlColor and secondarySelectedControlColor.
+ */
+void resetSelectedControlColors() {
+	alternateSelectedControlColor = secondarySelectedControlColor = null;
+}
+
 boolean runAsyncMessages (boolean all) {
 	return synchronizer.runAsyncMessages (all);
 }
@@ -4349,6 +4356,7 @@
 	if (appearance != null && application != null) {
 		OS.objc_msgSend(application.id, OS.sel_setAppearance_, appearance.id);
 		appAppearance = newMode;
+		resetSelectedControlColors();
 	 }
 }