diff --git a/server/src/wled_controller/static/css/cards.css b/server/src/wled_controller/static/css/cards.css
index 74f5059..913b43e 100644
--- a/server/src/wled_controller/static/css/cards.css
+++ b/server/src/wled_controller/static/css/cards.css
@@ -107,6 +107,14 @@ section {
 
 .card-running {
     border-color: transparent;
+    background: linear-gradient(
+        calc(var(--border-angle) + 45deg),
+        var(--card-bg) 0%,
+        color-mix(in srgb, var(--primary-color) 12%, var(--card-bg)) 40%,
+        var(--card-bg) 60%,
+        color-mix(in srgb, var(--primary-color) 8%, var(--card-bg)) 85%,
+        var(--card-bg) 100%
+    );
 }
 
 /* When card has a custom color stripe, keep it and shift the animated border away from the left edge */