Due to the extreme noise on the flightdeck of an aircraft carrier, personnel handling the aircraft have specific-colored flightdeck jerseys which by sight describes that person's function and is also the basis for referring to these personnel as "Skittles":
Purple – Aviation Fuel Handlers (also known as "grapes").
that's in the Navy.
on another note: When the colors of all the U.S. armed services' uniforms are combined, the color purple appears; therefore, military insiders refer to inter-service operations as "purple" operations.
