I found some lovely leafy/vine in soft muted colors on white (I bought green, lavendar and blue) at our LQS a few years ago on sale. I love it, and have used it on a few quilts now. I am glad I bought 8 yards of each color! There are some lovely wide backing fabrics available-Joann's has them-not too bad when using a 50% coupon! I bought a bolt of lovely blue paisley (soft, muted color) with a 50% coupon. I would use a soft all-over design with a garden type theme, in a very soft color on white, if your backing is white. Bind it maybe with left-over scraps, sewn together as a scrappy binding