diff --git a/static/css/style.scss b/static/css/style.scss
index 7807fda..3cbe8a1 100644
--- a/static/css/style.scss
+++ b/static/css/style.scss
@@ -541,3 +541,21 @@ body {
   }
 }
 {% endfor %}
+
+/* style for browser-update banner */
+body .buorg {
+  border-bottom: unset;
+  background-color: unset;
+}
+body #buorgul, body #buorgig {
+  background-color: #5bc0de;
+}
+@media (prefers-color-scheme: dark) {
+  body .buorg {
+    color: #ddd;
+    box-shadow: 0 0 5px rgba(255, 255, 255, 0.2);
+  }
+  body #buorgul, body #buorgig {
+    background-color: #40729e;
+  }
+}