unkempt stump
Ignore the game, that intentionally gets faded out a bit when in the menu.
But the text is supposed to be nearly white. #EEEEEE to be precise. In reality it's closer to black than to white.
#UI appears washed out on HDR displays
dusky vapor
Perhaps invalid hdr settings. True HDR rendering(when outputting to an hdr display) uses several brightness settings for low/mid/high tones. If these are not calibrated/set in the game correctly, issues like that are common. That being said, I have only ever dealt with it in a custom engine at work, so I'm not sure if unity exposes any of that. Maybe look at the manual.
I'd also double check that the fade you mentioned is not applied to the text. If it's using a a canvas image, it could be an ambiguous sorting order issue.
Ah, it seems like unity does expose some of it. Or at least has a lot of text on it in the manual:
https://docs.unity3d.com/6000.2/Documentation/Manual/urp/post-processing/hdr-output.html