Easy does it....
Its in the heart, not the mind!
I'm afraid colour most definatly only exists in conceptual minds, though I'm guessing you're using colour as a metaphor for 'experience' and relating it to the heart. You know we used to relate different feelings to different internal organs? The spleen, for example, was thought to be related to anger, hence we have the saying 'to vent my spleen'.
But really, it's all in the mind.
Edited: 17/12/2012 at 14:10