Blue is a simple dip coating in plastic, not paint. Also, the caps are very fragile, check the depth of the bolts before tightening to avoid breaking. When first installed, at least a dozen caps were removed to keep the wheels tight enough. If you want them to stay intact (good luck with that) you should use a socket with a plastic insert, metal couplers will ruin them in an instant. As soon as I find a stronger set of nuts, I'll send them back.