Certain legends are black-on-dark in dark mode

[Qix-]

Hi, not a user, just a passerby, but I noticed that on dark mode of the demo site some of the legends/labels are black (whereas some are, correctly, white).

For example, the q2 and q3 in the below screenshot (whereas the individual bar legends are correct).

[tvst]

Ah, great find! This is a Streamlit bug — their Vega-Lite theme isn't updating the color of that legend. I'll file the bug there.