My thoughts exactly. At first glance, I thought it was the very fabric you were considering.

I would use a bright color.

Is this a scrappy done on ironed out coffee filters for your paper?

yes.

Bright color. Pink and blue sounded great.

I am no help on decision making, but what a beautiful group of blocks!!!

That is going to make a very pretty quilt whatever you decide to do. When I first looked, the bright pink jumped out. That would make very pretty sashing.
Sue

Bright colors with a scrappy binding from the colors in the blocks. Pink sashing, with little blue border then larger dark green border. Or switch them around. Have fun with it.

Bright colors with a scrappy binding from the colors in the blocks. Pink sashing, with little blue border then larger dark green border. Or switch them around. Have fun with it.

Ooops sorry for the double posting.