i would go with any color. i think those two colors are not bad. your style. your color. black and white are too plain and common. green, blue, red are rare colors for rims. they all look great on a car, but just choose one that is different, unique, and original.
leave the outer ring and the inner lip silver... then paint the spokes whatever color... i think it would look pretty hot with dark bronze spokes and a silver lip