diff --git a/plugins/endpoints/frontend/views/ServerCertSettings.vue b/plugins/endpoints/frontend/views/ServerCertSettings.vue
index 2262f218..9c91db64 100644
--- a/plugins/endpoints/frontend/views/ServerCertSettings.vue
+++ b/plugins/endpoints/frontend/views/ServerCertSettings.vue
@@ -419,6 +419,16 @@ function formatDate(dateString) {
   border-radius: 4px;
   padding: 12px;
   margin-bottom: 16px;
+  color: #856404;
+}
+
+/* Dark mode support */
+@media (prefers-color-scheme: dark) {
+  .warning-banner {
+    background: #664d03;
+    border-color: #ffca2c;
+    color: #ffecb5;
+  }
 }
 
 .expiry-warning {