The Amstrad CPC 464 I had as a kid had a lot of
funky-coloured keys.
Didn't the Datapoint terminals also have colored keys?
I'm not familiar with that one, but you made me think of later Newbury Labs
terminals (orange function keys) so I dug out my pictures of the storage
area at Bletchley Park and there's quite a few multi-coloured keycaps in
there:
Hang on, what are we looking for here? If it's just machines where not
all the keycaps are the same colour, it would be quicker to list those
that don't have at least one odd-coloured key (darn it, the TRS-80 Model
1 has the 'Clear' key in white with all the other keys black).
I thought were were looking for machines with very unusual colours on the
keyboard.
-tony