diff --git a/src/main/java/org/gcube/portlets/user/workspace/client/view/windows/DialogConfirm.java b/src/main/java/org/gcube/portlets/user/workspace/client/view/windows/DialogConfirm.java
index 539b324..1683539 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/client/view/windows/DialogConfirm.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/client/view/windows/DialogConfirm.java
@@ -106,6 +106,7 @@ public class DialogConfirm extends DialogBox implements ClickHandler {
 		HTML html = new HTML(message);
 		html.getElement().getStyle().setMarginLeft(5, Unit.PX);
 		hpMask.add(html);
+		dock.getElement().getStyle().setBackgroundColor("#CCCCCC");
 		vpContainer.add(hpMask);
 	}