I saw a couple of people doing this and it looked like fun! At first I thought I wouldn't have enough color-coordinated pictures to make the full rainbow, but after some digging I found them all, and fairly recent images too! Most of them are commissions, some are gifts. I don't draw for myself often enough to have a wheel of personal art >_>; Though it might be interesting sometime to use this as a series of prompt for colorful images! Pictures for CassioBunny make up half of the wheel, though I'm not sure if that says more that I just draw for her a lot (I do) or if my art for her tends to be more color-themed (it seems to be). Both? Anyway, this was fun.
Template here: http://sunset.sdbx.jp/pixiv_psd/