Set different subtitle colors for SDR and for HDR content

[znre]

Stremio Version
Stremio 1.6.8 x86_64 on Nvidia SHIELD

Is your feature request related to a problem? Please describe.
When using Stremio on an OLED TV that gets very bright at HDR/Dolby Vision content, the white color subtitles are too bright so I have to manually switch it to the gray color.

However, when watching SDR content, the gray colored subtitles are too dark, so I have to manually switch it back to white.

It can get tiring to have to do this manually.

Describe the solution you'd like
Add a feature/option for the user to select separate subtitle colors for SDR and HDR/Dolby Vision content.

Describe alternatives you've considered
An alternative solution might be to add an option to lower the brightness of the GUI peak luminance on HDR/DV content like Kodi did here

Additional context
N/A