Use only default (white/black), red for bad, green for good. If you need more than that, like vim or whatever, then maybe a 'fullscreen' TUI is better, with a specified background and foreground. For CLI tools, I'm not sure if I prefer more colours.
The CSS to make the terminals look like iTerm was smooth, to the point I read them as screenshots.
Color is cultural. Red is associated with good in China
> red for bad, green for good
8% of men of Northern European descent (and 0.4% of women) are red-green colorblind. That'd be a terrible choice. Use blue-orange, blue-red, or purple-green.
Eh, LS_COLORS is sometimes useful once the meanings are in your subconscious.
Hard disagree on the red/green. Use whatever you think appropriate and make it user configurable.