I'm getting the Double Wedding Ring top put together. I'm considering a 30's solid back for it and wondered how much shadowing I'd get on the topside. For instance, if I back it in 30's red, will that cause my off-white centers and melons to have a pink shadow after it is quilted? The vintage DWR I have is backed in the 30's green/aqua and it doesn't seem to affect the color of the front. Any thoughts or experiences?