diff --git a/webroot/css/co-grouper-base.css b/webroot/css/co-grouper-base.css
index 3d77f57..bdd0d9c 100644
--- a/webroot/css/co-grouper-base.css
+++ b/webroot/css/co-grouper-base.css
@@ -29,5 +29,5 @@
 }
 
 .grouper .btn.btn-danger.btn-grouper:hover {
-    background-color: var(--danger);
+    filter: none;
 }
\ No newline at end of file