diff --git a/contrib/clean/css/htmlelements.css b/contrib/clean/css/htmlelements.css
index 44f490d..4ea8431 100644
--- a/contrib/clean/css/htmlelements.css
+++ b/contrib/clean/css/htmlelements.css
@@ -282,6 +282,15 @@ tr.region-populated {
   display: none;
 }
 
+.block-region {
+  text-align: center;
+  border: 2px dashed #fff;
+  color: #000;
+  font-weight: bold;
+  background: #CDCDCD;
+  padding: 5px;
+}
+
 /* Modules */
 
 .eminline-wrapper {