Yellow: Aircraft handling officers, catapult and arresting gear officers.
Red: Ordinance loading, unloading, and disposal, crash/salvage crews.
Brown: Plane captains.
White: Quality control, plane inspectors, landing signal officers, air transfer officers, liquid oxygen crews, safety observers, medical personnel.
Purple: Plane fuelers.
Blue: Plane handlers, aviation elevator operators, tractor drivers, messengers.
Green: Catapult and arresting gear crews, air wing maintenance personnel, cargo-handling personnel, equipment troubleshooters, hook runners, photographer's mates, helicopter landing signal enlisted personnel (LSE)
Hope this helps.