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