Contrast for active/hover on the app navigation might be too low

[juliushaertl]

From #33568 (comment)
contrast quite low, might not pass accessibility test:

@jancborchardt might be a critical one for accessibility, so maybe you can provide a mockup or spec so this can be picked up.

[jancborchardt]

How does it look like for focus? As long as we have proper borders there it could be fine.

Also, we could use bold text for the active entry? (Not for hover/focus)

[ya-d]

Maybe hover and focus backgrounds should be transparent too, if the entire background is transparent. Looks a bit dull otherwise. Also the perceived color changes quite a lot depended from the color of the background image which is quite irritating. Probably this effect is reduced if hover is transparent too.

Appears almost white:

Appears gray against bright background (and very low contrast):

[szaimen]

@jancborchardt how can we solve that?