Regebro,
that's really cool! i'm with you for 0,1,2,3, but then 4 is green, 5 nothing pops up, 6 purple, 7 nothing, 8 yellow...
0-4 just seems natural to me, 5 & 7 are numbers that have followed me since i was a kid, 6 & 8 i connect to certain things that remind me of those colors.
music is also in colors to me, not so much specific notes, but songs are. it'd be really interesting to sequence the songs on an album after what colors the "produce", like a color spectrum or something.
Roel,
i don't wanna come off as if know better than anyone, but if you're a musician and have perfect pitch, you know it. i promise

. you probably have relative pitch, like i have. i can be dead on one time, and another time i'll just be in the same ballpark, close but not exact. when you meet people with "absolute perfect pitch", some can tell you some pretty 'scary' stories of how they can't stand listening to the radio because of all the crappy singers singing just off pitch. my professor at the university where i went actually felt sick when he heard stuff being played slightly out of tune. good true story: once he called the classical music radio station and told them they had to fix the drive one of their turntables because it was spinning a fraction of an rpm too slowly. i guess it pissed him off... ( BTW, Regebro, it was P2...

)
far from all people with perfect pitch seem to have this problem, though.
micmac