Shoe Colors

So I've been slowly learning the ways of modding the global files and such. I've managed to import some files around, but I was wondering which texture name and which .IFF file included the file to edit the 30+ colors of the color palette of the shoes in game? Ex. making the black color all the way on the right actually black and not grey.

EDIT:
I'm thinking it's c_gradient texture in 2k12. the only thing is it exports as a n2kf extension, but when I try importing one modtools is unable to recognize it and is asking for a N2k model file

NEVERMIND i'm wrong... i don't know what to do... it's basically what johndoe did to his earlier globals