Change icon color in picture-entity

Configuration
1

Hi,
I have a picture-entity card for my vacuum cleaner that I have a problem with the icon colors.

I’ve set up the style for each icon like this:

  - type: icon
    icon: mdi:bell-ring
    tap_action:
      action: call-service
      service: vacuum.locate
      service_data:
        entity_id: vacuum.xiaomi_vacuum_cleaner
    style:
      top: 77.5%
      left: 80%
      "--paper-item-icon-color": rgb(115, 122, 130)

The issue is that when Home assistant turns on dark mode the icons gets light gray which is very hard to see. I’ve also tried to set the color to red to see if that changes the color of the icon during light mode but it doesn’t either. How do I set the color of the icons and how do I set the color during dark mode?

Thanks!