I've always considered colour perception to be fairly relative...

As I understand it, biologically males and females perceive colours differently.. for starters.

Hmmm... citation needed there... googles aha, here you go...

http://scienceblogs.com/cognitivedaily/2007/07/14/do-women-perceive-color-differ-3/

Well... reading that, there seems to be some evidence of biological variations in colour perception?