i dont really get it.......
in blender, if you add a new Material to your model, and you go to the texture menu [F5]
then down in the material tab you see four boxes underneath eachother, saying R, G, B and A
you can set them from 0 to 1000 to change the color of the texture
if you do that on your model, and then export it, will the colors show up ingame?