diff --git a/ui/static/css/system.css b/ui/static/css/system.css
index 84f9e067..870dd8e1 100644
--- a/ui/static/css/system.css
+++ b/ui/static/css/system.css
@@ -225,6 +225,10 @@
         --feed-has-unread-border-style: solid;
         --feed-has-unread-border-color: rgb(33 57 76);
 
+        --category-has-unread-background-color: #1b1a1a;
+        --category-has-unread-border-style: solid;
+        --category-has-unread-border-color: rgb(33 57 76);
+
         --keyboard-shortcuts-li-color: #9b9b9b;
 
         --counter-color: #bbb;