diff --git a/bundles/org.eclipse.ui.themes/css/e4-dark_mac.css b/bundles/org.eclipse.ui.themes/css/e4-dark_mac.css
index 8145df6b81f..535f9f5f48e 100644
--- a/bundles/org.eclipse.ui.themes/css/e4-dark_mac.css
+++ b/bundles/org.eclipse.ui.themes/css/e4-dark_mac.css
@@ -111,3 +111,7 @@ CTabFolder[style~='SWT.DOWN'][style~='SWT.BOTTOM'] {
 {
 	background-color: #1E1F22;
 }
+
+#org-eclipse-e4-ui-compatibility-editor Composite{
+	background-color: #1e1f22;
+}
diff --git a/bundles/org.eclipse.ui.themes/css/e4-dark_win.css b/bundles/org.eclipse.ui.themes/css/e4-dark_win.css
index b333cd4bf09..3ed5ca2d579 100644
--- a/bundles/org.eclipse.ui.themes/css/e4-dark_win.css
+++ b/bundles/org.eclipse.ui.themes/css/e4-dark_win.css
@@ -193,3 +193,7 @@ CTabFolder[style~='SWT.DOWN'][style~='SWT.BOTTOM'] {
 {
 	background-color: #1E1F22;
 }
+
+#org-eclipse-e4-ui-compatibility-editor Composite{
+	background-color: #1e1f22;
+}