diff --git a/htdocs/luci-static/argon/css/cascade.css b/htdocs/luci-static/argon/css/cascade.css
index 25e4ee5..4993a23 100644
--- a/htdocs/luci-static/argon/css/cascade.css
+++ b/htdocs/luci-static/argon/css/cascade.css
@@ -741,6 +741,9 @@ div[style="width:100%;height:300px;border:1px solid #000;background:#fff"] {
   font-size: 110%;
   font-weight: bold;
 }
+.alert-message.error > h4 {
+  background-color: #ffd600;
+}
 .alert-message > * {
   margin: 0.5rem 0;
 }