I sort more by type then color. I still have a closet full to go through, but the stuff I have pulled out and put in the cubby's are more according to purpose, or collection. I have a cubby or two that are all florals, same with tropicals, kids, solids, asian, skeletons and skulls, ( yes, I said skulls, I know, creepy). I tend to buy in collections since I started quilting,so if I buy stuff that belongs together, it stays together, even the scraps. If I separated it out into colors I would never figure out how to use it together. And that terrifies me.