Welcome to the board from Southern California!!!
Very pretty!!
I like the idea of a thin white border, maybe a 1 1/2" cut size. then maybe a darker blue for a wider 4 1/2" to 6" wide.
Welcome from West Tennesse. Look up "Prarie Points"
I bet they would be awesome on the outside edge, dark blue behind w/ smaller white one in front. I love them. Your quilt either way is beautiful.
Thank you all for you advise! I've decided to go with a thin white (I think approx 1") then perhaps a dark blue batik border...although prarie points would be beautiful???