diff --git a/theme-arc-blue.css b/theme-arc-blue.css
index 259a8a8..0ac0273 100644
--- a/theme-arc-blue.css
+++ b/theme-arc-blue.css
@@ -1183,3 +1183,6 @@ swagger-ui .info li, .swagger-ui .info p, .swagger-ui .info table {
 .ui.link.list .item, .ui.link.list .item a:not(.ui), .ui.link.list a.item {
     color: #aaa;
 }
+.ui.wide.popup.fixed {
+    background: #000;
+}
\ No newline at end of file