About 30 years ago I was at the Mack truck R&D facility in Allentown for a while and the production plant was still producing trucks to customer color specs. Many old heavy hauling companies still used the colors from the 20's or from their original horse drawn wagons. Like one with a green frame, yellow cab, black fenders, red wheel centers with yellow rims. Yellow pin stripes on the frame, green on the cab and black on the wheels.
The workers called them "circus wagons".
