How to change the Backcolor from a Media-Player?

[GunterAv]

Hello,

How can I change the background of a media player?

type: custom:bubble-card
card_type: media-player
entity: media_player.wave_iv_3
styles: |-
    .bubble-button-background {....

"bubble-button-background" does not work.

Thanks for helpful tips.

Gunter

[GunterAv]

Hello,

I'll answer myself ;-) Maybe someone needs it.

styles: | 
    .bubble-media-player-container {
      background-color: red !important;
    }

Best regards
Gunter