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The CH wheels have a special paint "process", not a standard paint code. (Germany typically calls this "Diamond Silver", they have also used the term "Decor Silver".) They use a light color base and a very thin layer of a silver paint that is applied using special spray equipment. The light base coat is visible through the very fine layer of the special silver making the silver more brilliant. This same process is used for the Diamond Black color (RSGT, RGR, etc) and they use a dark base coat with the same silver top layer. There is a final top coat of clear that is applied over the silver.