I accidentally compile color support out of st, or set xterm*colorMode:false to avoid seeing the backside of a unicorn randomly rubbed all over the terminal, on account of git and other wares being bad at their inability to not spew color codes. A sensible default would be to set no colors, in the event that the colors are unreadable (due to colorblindness, etc) or distracting, but that ship sailed. Most of my vim config on RedHat linux was disabling wacky vendorisms, and back when I used linux I did have a "special terminal" for some NVIDIA installer that mandated colors to be usable. Maybe the terminal title was set to Fisher-Price, maybe not.
Dang. I wish I had the autism to bristle at colors. Think about all the lost hours agonizing over themes! Not feeling the agonizing tension between the fact that cool-retro-term made your terminal into an awesome monochrome CRT but that it's monochrome green so your syntax highlighting is all messed up!
