Don't you hate it when the guys are right! The lime green is what draws my eyes in. Your lovely piecing gets lost. My suggestion would be to try some teal, turquoise or maybe even royal blue against the blocks. Could also see a nice neutral with perhaps a tiny single color print in it that would pick up one of the colors of the blocks, tying it in but not detracting. Maybe even a pin dot? It's so hard to tell from a computer pic sometimes.