diff --git a/toolkit/themes/shared/menulist-shared.css b/toolkit/themes/shared/menulist-shared.css
index 5dd5549674570170a694afbd9ea4526e52e3192a..a24ded413065ce1493e8622c5777c5b5bdac128e 100644
--- a/toolkit/themes/shared/menulist-shared.css
+++ b/toolkit/themes/shared/menulist-shared.css
@@ -14,7 +14,7 @@
 
 :host(:not([native])) {
   appearance: none;
-  background-color: var(--button-background-color);
+  background-color: light-dark(rgba(0,0,0,.1), rgba(255,255,255,.1));
   color: var(--button-text-color);
   border-radius: 4px;
   padding-block: 4px;
