Are the rims of pulleys required to be color-coded orange?

OSHA’s color-coding standard, 29 CFR 1910.144, does not address the use of the color orange. ANSI does not require that the rims of pulleys be colorcoded orange.

ANSI Z535.1-1998, Safety Color Code, states at paragraph 6.2 that, “if a color is to be used to identify the hazardous parts of machines, Safety Orange shall be used.” The ANSI standard, in Section 6.2.1, gives examples of applications where the color Safety Orange may be used, such as, “marking exposed parts (edges only) of pulley, gears, rollers, cutting devices, power jaws, etc.” OSHA has not issued any citations recently that relate to painting the rims of pulleys Safety Orange. The ANSI standard is a guideline.