I went through the basenotes directory and for fragrances that had color as part of their name, I determined the quantity each for masculine, feminine and unisex. I could present all the data here (does anyone want that?), but I will point out a few things, some obvious, some not:
(1) Fragrances with Blue or Black in their names are more frequently masculine than unisex or feminine. But feminines are well-represented for both.
(2) Pink, Red, Purple, White and Yellow are most frequently feminines.
(3) Green is most frequently unisex (though nearly evenly distributed).
(4) Compare Blue and Black (sorry I can't get this to line up properly):
Masculine Feminine Shared
Blue 70 56 9
Black 62 45 36
A few observations:
(a) the ratio of masculines to feminines for blues and blacks are not far apart (1.25:1 and 1.38:1)
(b) the lack of unisex representation for blue is surprising.
I realize that the directory is not infallible, but it is a starting place to work from.