diff --git a/assets/theme-css/bulma.css b/assets/theme-css/bulma.css
index d686162d..d85d7401 100644
--- a/assets/theme-css/bulma.css
+++ b/assets/theme-css/bulma.css
@@ -373,7 +373,7 @@ a.navbar-item:hover {
     margin-left: auto;
   }
   .navbar-dropdown {
-    background-color: #fff;
+    background-color: var(--pst-color-surface);
     border-bottom-left-radius: 6px;
     border-bottom-right-radius: 6px;
     border-top: 2px solid #dbdbdb;