For those who suggested black, normally I agree that black makes the colors pop. But in this quilt there is some navy, and no black. I like the border to be a color somewhere within the quilt. Besides, I have never liked navy with black in anything (clothing, decor, etc). So that color was purposefully not under consideration.
I've made up my mind. This one was tough because I honestly think all the colors I auditioned looked good. I almost always yank one away, saying, "Uh, no, definitely not" but this time it was more like, "Hmm...I like the teal...and how about aqua? Yep, I like that too, but how about yellow? Nice! Or magenta or purple---cool. Or instead of bright, gray?" I really needed several sets of eyes on this one to give votes.
I won't tell you what colors I chose. The big reveal will come later. But I will say that I decided on no border, just binding, and a contrasting backing.