I'm having way too much fun with these colored pencils! When I look at this I have two thoughts: "that looks like a child drew this" and "well, looking at it closer that child is pretty good". I decided that maybe I should draw the white with yellow. Really what I wanted to do was to associate a tone in the drawing with a color. I thought maybe it would help me visualize the variances in tone when drawing fabric. I'm not sure if it helped but it turned out interesting.