Primordial Nothing
Maze
I wonder if this was ever tested on synaesthetes..
With the whole eye/color thing? What an interesting thought. Wouldn't do much for me. I'm grapheme/color.
With sounds provoking colour-associations, was it? You've mentioned this before, but it's been a while. XD;
But yeah, seems like an interesting niche to study, though, I imagine the people being studied might be a little unhappy with it all.
Pffft, for SCIENCE!