I remember reading in college a paper on colors and keys of music that they might go with.
I couldnt find the paper but did find some other interesting info on keys, colors, etc.. I thought this maybe of some interest since the sound/color/name interaction seems to be a part of the BJFE pedals.
there alot of cool links and already listed info under this site:
http://www.library.yale.edu/~mkoth/keychar.htm
scroll down mid way to get to the color and musical pitch links,,,this was one of them
http://www.harmonics.com/lucy/lsd/colors.html
theres probably alot more info out there,,anyhow thought it might be of some interest to others.