Recently my Plex web player started changing to this washed-out theme (shown in the included screenshot) and I can find no way to return to the former default theme view. On various screens I need to perform a select-all simply to be able to read the options.
Is there a way to remove/disable this imposed [upon me] theme and return the player to its former default theme?
You’re going to have to add the OS you’re running on the client and what web browser/version so someone can help troubleshoot this.
Initially I’d look at some sort of skin/theme/dark mode function of the web browser. Easiest way to test is to open in another web browser to see if it has the same look.