For me it would depend on the size and intended use: If a bed quilt, Tartan's idea of medium green to reverse for Spring with a bed runner would give you double duty. If it's a lap quilt, a pretty print that looks good on its own in a red, green, ivory, or combo of any or all of the colors in the quilt would make both sides beautiful for a single use. Either way, I'd take it shopping with me and hold it next to every fabric I could find that's in matching color(s) and see what I like best!