At BTT4.017, HUD Fonts are displayed Black.
Cannot change other colors from setting panel.
which version of macos are you running?
Mm, have the same problem with 4.069 and Ventura
I'm not able to reproduce this, it looks like @SLE's screenshot for me.
Are you sure you did select the whole text before changing the color? The color picker always only affects the selected text.
Ah, stupid me, select the whole text, that was exactly the problem, sorry 
Maybe it makes sense to change the overall color if nothing is selected. I'll check how other apps are doing this.
Having to choose the text seems perfectly ok to me. You should just think about it, which is not that difficult. 