The exterior of each school bus shall be national school bus glossy yellow except as follows:
     The rooftop may be white.
     The fenders of school buses manufactured before January 1, 1976, may be black.
     Body trim, rub rails, lettering other than on a stop signal arm and bumpers on a Type I school bus shall be glossy black.
     Lettering on a stop signal arm shall be white on a red background.
     Bumpers on a Type II school bus may be glossy black or a bright, light or colorless finish.
     The hood and upper cowl may be lusterless black or lusterless school bus yellow.
     Grilles on the front, lamp trim and hubcaps may be a bright finish.
     The name or emblem of a manufacturer may be colorless or any color.
     The exterior paint of any school bus shall match the central value, hue and chroma set forth in rules promulgated by the Department.