no colur code available. de rosas are handpainted and so even the same colour differs a bit from frame to frame (I have a De Rosa Team in blue and a friend got one a few weeks ago too. his one is darker, more purple)
try to get a good airbrusher that can repair your frame or get some of these scale model paints. (in Germany the brand revell is famous for many many colours for the plastic models like cars, planes, boats. etc.). You can mix up the matching colour by yourself for rapairing minor scratches.
Kind regards,
Thomas