Like all forms of synesthesia, Grapheme-color synesthesia is involuntary, consistent, and memorable.
Commonness & Misconceptions
Grapheme-Color Synesthesia is probably one of the most talked about forms of synesthesia because is fairly common. Despite its commonness, two synesthetes don't necessarily associate the same letter with the same color. Many synesthetes don't even realize that they're experiences are irregular. It has been found that synesthetes have more grey-matter in their brains.
Experiences and Reports
When I see equations, I see the letters in colors – I don't know why. As I'm talking, I see vague pictures of Bessel functions from Jahnke and Emde's book, with light-tan j's, slightly violet-bluish n's, and dark brown x's flying around. And I wonder what the hell it must look like to the students."
"It is difficult to explain...I see what you see. I know the numbers are in black...but as soon as I recognise the form of a 7 it has to be yellow."
Experiences and Reports
When I see equations, I see the letters in colors – I don't know why. As I'm talking, I see vague pictures of Bessel functions from Jahnke and Emde's book, with light-tan j's, slightly violet-bluish n's, and dark brown x's flying around. And I wonder what the hell it must look like to the students."
"It is difficult to explain...I see what you see. I know the numbers are in black...but as soon as I recognise the form of a 7 it has to be yellow."