Pure white on my monitor can't be created by CSS anyway, thank god, that'd be a full 1014 nits and actually is painful to look at. But this is a general issue

Pure white on my monitor can't be created by CSS anyway, thank god, that'd be a full 1014 nits and actually is painful to look at. But this is a general issue - you want to be able to represent extremely high contrast, far beyond the brightness of a sheet of paper in photos, movies, games, etc. But you want a significantly lower contrast for text. Sadly, websites mix both and offer no way to configure them separately.