diff --git a/css/light-grey.css b/css/light-grey.css
index 30d3237fb..978f9d95c 100644
--- a/css/light-grey.css
+++ b/css/light-grey.css
@@ -2398,6 +2398,12 @@ a.summary, a.summary:hover {
   background: url(../images/ok.png?v=v2.6.1) 1em 1em no-repeat #cfc;
   padding-left: 3em;
 }
+.message_warning {
+  border: 1px solid #ec9800;
+  background: url(../images/error.png?v=v2.6.1) 1em 1em no-repeat #ffd78d;
+  color: #000;
+  padding-left: 3em;
+}
 .message_error {
   border: 1px solid #933;
   background: url(../images/error.png?v=v2.6.1) 1em 1em no-repeat #fcc;
diff --git a/css/light-grey.scss b/css/light-grey.scss
index ab733ad74..9077f73fe 100644
--- a/css/light-grey.scss
+++ b/css/light-grey.scss
@@ -2762,6 +2762,12 @@ a.summary,  a.summary:hover {
 	background: url(../images/ok.png?v=#{$version}) 1em 1em no-repeat #cfc;
 	padding-left: 3em;
 }
+.message_warning {
+	border: 1px solid #ec9800;
+	background: url(../images/error.png?v=#{$version}) 1em 1em no-repeat #ffd78d;
+	color: #000;
+	padding-left: 3em;
+}
 .message_error {
 	border: 1px solid #933;
 	background: url(../images/error.png?v=#{$version}) 1em 1em no-repeat #fcc;