Such pretty blocks. Are you going for an old fashioned look? Then pick one of the colors you love from the blocks & go for it. Are you looking for something more up-to-date? What about an animal print...like a zebra, tiger, etc? Another modern take on this would be to use a black/white scrollwork or similar print. I am always amazed how a black/white or animal print takes a quilt top from ordinary to drop-dead gorgeous.