Not totally happy with any of the pieced borders that I've tried, I went back to a plain border. All of my blues are either very dark or very gray. I needed something more of a Royal Blue.
Last week, a new Quilt Store opened a couple of miles from my house in Middletown, Ohio. I stopped in today and spent some time talking to the owner and purchasing a potential border for the quilt - in Royal Blue.
I think the blue needs to be a bit wider that what is show here. I do think the hue mimics the overall color of blue that is in the quilt.