Color is not claimed as a feature of the mark.
The mark consists of a circular impression hand ground into the aluminum skin of truck bodies, truck caps, trailers, drawer units, cabinets, shelves and pad racks, applied using a 4" grinding disk on an aluminum surface that has been prepared in such a way that the plain aluminum is disturbed, and the circular pattern applied over top. The pattern is not 100% uniform though an attempt is made to make the lines horizontally straight across the surface.