Cytowic

"It is not a hallucination but it is hard for me to describe.  As I look at a page, I see the colors there even though I see the color of the real ink that's before me.  I know it isn't there for real, but I still can't help seeing it.  There is still a sensation that the color is there. I can't remember when I didn't have it.  It's not something that I do.  It happens all by itself.  Letters and colors seem exactly as they are since forever." - MT

* page 43 In Cytowic's "Synesthesia; A Union of the Senses"