 Aircraft painted anti-flash white in the nuclear strike role had a pale pink and blue flash, the same shades as the roundels, to reflect some of the thermal radiation from a nuclear explosion.The Royal Navy and Army do not use the fin flash but have the words "ROYAL NAVY" or "ARMY" on the rear fuselage or fin instead.An exception to this was the Harrier GR7s and GR9s of the Naval Strike Wing, which carried similar markings to RAF Harriers.