So, CGA has more color palettes than you’d think! Here are the default ones:

First mode is the standard CGA mode as you know it, it’s most widely used because it looks best on b/w monitors.
Second mode colours are devoid of blue component, and appear much darker on b/w screens
Third mode is ‘undocumented’ but I actually stumbled on it by accident. It has some quirks but it looks nice.

Switching them in-game is quite tricky, so I’d rather stick to one. Which one should I choose?