Wonky Rainbow is done, binding and hanging sleeve sewn down. It is hanging on a slanted wall so the bottom isn't really narrower than the top. I'll probably try for a better photo on a different design wall. It is about 40" x 41".
This is what I put on the back. I thought it went nicely with the outside border fabric.
I played with the order of the red/purple blocks and I'm ready to sew it together now. Some of the higher contrast areas really aren't that noticeable in real life. The camera has a hard time getting the red right.