The card_media_player's volume slider color is always black.

[Ssiswent]

Describe the bug
The card_media_player's volume slider color is always black.

Expected behavior
Volume slider color should be transparent like controllers and this Demo.

Additional context
Maybe these two have some conflicts:

ulm_card_media_player_enable_art: true
ulm_card_media_player_enable_volume_slider: true

Related Card Config

- type: "custom:button-card"
        template:
          - card_media_player
        entity: media_player.bedroom
        variables:
          ulm_card_media_player_enable_popup: true
          ulm_card_media_player_name: HomePod mini
          ulm_card_media_player_enable_art: true
          ulm_card_media_player_enable_controls: true
          ulm_card_media_player_enable_volume_slider: true
          ulm_card_media_player_enable_volume_buttons: true
          ulm_card_media_player_more_info: true