diff --git a/src/plainui/styles/themes/38c3.scss b/src/plainui/styles/themes/38c3.scss
index e25cf5a13ebf5a0476997f2523c5365e7deb61f5..7cc590ddb97dd500280a5a00730b0311b8b42b8c 100644
--- a/src/plainui/styles/themes/38c3.scss
+++ b/src/plainui/styles/themes/38c3.scss
@@ -17,3 +17,7 @@ body {
   background-image: url("38c3/img/grid-12x16.svg");
   background-repeat: repeat;
 }
+
+.hub-alert {
+  background-color: $black;
+}