The Apple IIgs' unique approach to 16 colors @ 640px with a 32K framebuffer
blakespot.com
blakespot.com
https://oldbytes.space/@blakespot/109441218193887773
It makes for a far better color 80-column experience (maybe for ANSI term emu) than that offered by, say, the Atari ST which had a strict 640-mode 4-color limit (but was a rather faster machine). Of course, they had some pretty creative "solutions" over there, I must say (TAZ terminal).