Do you have the Color heading showing in your bin? You should be able to right click that heading and choose to Sort Descending or Sort Ascending. I haven't tried it, but in theory it should work.
i think it should be under edit label, or somewhere in the speed menu in ur super bin. i know it's there it's just one of those things i have to be looking at it to find it. i've done it many times. google it real quick i'm sure u'll find it.