I would also have to see them together to say for sure. I don't think having a different color on the back is an issue, as long as they look good together. If you think they look good together, use it!

Sounds like it will be perfect to me. I like the back to be different sometimes.

Thank you all for your responses. I am so glad you all agree to use it. I think the binding will be fine with the front and the back. I really didn't want to spend the extra money so this is perfect! Thank you again.

I seldom have my backs match the back. I try to use a color for the binding that looks good with both sides. I donate most of my quilts and not sure if they will be used or how they will be cared for. I am trying to use up my oldest fabrics and can't always find just what I want.

I love quilts with a touch of whimsy. If you find the blue bothers you as a part of the back, why not find some fabric with blue butterflies on it and applique some on the front. Ta Da! Problem solved. At least, for me it definitely would be just about perfect. Fabric.com has some that could be used. https://www.fabric.com/find?SearchTe...dv|c|product||

And Amazon has some pretty butterfly fabrics. https://www.amazon.com/butterfly-cot...+cotton+fabric

If you feel uncomfortable with the backing your ordered that has blue in it, set it aside and use it for another quilt. My experience is that if, I am ill at ease with a color choice, it haunts me until I change it. Think of the backing with the blue as the start of your next quilt. :o