Light colored label text broken in dark mode

In !2321 (merged) we changed .gl-label-text-dark from gl-text-black-normal (which doesn't change color in dark mode) to gl-text-gray-950 (which does).

So now labels with a light background color have dark text in light mode:

Screen_Shot_2021-09-09_at_1.27.03_pm

But are not readable in dark mode:

Screen_Shot_2021-09-09_at_1.27.40_pm