I really don't worry about the backing color going with the top. They are seen separately. If I have a color in the top that I want to use, then I pick that.
Very pretty quilt.

Have you checked Sew Batik, if you're looking for a batik backing? They have a lot of choices. Other Options include Backside Fabrics and Thousands of Bolts, if you want choices.

Great looking top! Is that hand appliqued? If your DIL likes red, the warm burgundy family with a peach binding and/or quilting thread would be wonderful. It doesn't have to be a batik fabric to have a mottled look.

No applique at all. It is printed blocks from a line called Hoffman Bali Batik. Thank you for your suggestion. I like it.

LOL still considering all the suggestions and looking at what I can find for each.

Thank you all for your suggestions. I am looking at options for them all to see what I like better.

I don't have any suggestions. Just wanted to say your quilt is beautiful!