Hey y'all, I have synesthesia (4 kinds to be exact, yes, I realize that is a lot). But the particular type I enjoy having most (the coolest one) is my sound-color synesthesia (I see sound as color, in addition to hearing it).
As a composer, I find music that can create the most interesting colors is music that I pay attention to the longest (I am somehow listening to a piece in C-minor by gabriel faure, and it is white)
So, my synesthesia color-note coordination is like this (though it's not very strong, this is BASICALLY it)
the accidentals are completely random, and don't really have a set color, it depends on which notes come beforehand and such)
C - Blueish light green
D# - so far, no specific color has settled in
D - Orange
D# - usually black (though not always, black reoocurs the most)
E - White
F# - Yellow (but with the same deal as D#)
F - Red
G - Blue
G# - Green (this one is specific
A - Red
A# - Pink for the most part
B - Green
FYI, for sound-color synesthesia, there are two kinds, projected and color-association (I have projected)