diff --git a/src/components/ha-button.ts b/src/components/ha-button.ts
index b14d3db48f..1f32aec63e 100644
--- a/src/components/ha-button.ts
+++ b/src/components/ha-button.ts
@@ -154,6 +154,7 @@ export class HaButton extends Button {
 
         :host([appearance~="plain"]) .button {
           color: var(--wa-color-on-normal);
+          background-color: transparent;
         }
         :host([appearance~="plain"]) .button.disabled {
           background-color: transparent;