Now that I have assembled the center of the Easy Street mystery quilt I am quite confused which border idea to use. I ordered a large print with lime/aqua/purple to use for the backing which might also suffice for a plain border if I decided to go that way, but there are so many pieced options.
Blue sawtooth border:
Piano key border:
Or some really wild options using a mirror image of the green triangle edge on the outside of an inner border, either pieced or plain:
(I rather like this one but I'm not so crazy as to want to MAKE it!)
Slightly more subdued and using the print border too.