For fun, I think variable legend colouring could be interesting, for the regular ANSI layout, the top row could be blue, []{}|\ could be orange ;:'" could be red, <>?,./ could be yellow, QWERT...NM could be green, or further mixed colors
I obviously made up the colors, but this could be fun, just a wild idea
However, I personally found orange on white a bit boring
(At least initially, now, maybe not so much, but it's still extremely risky)