The Aviationist has published a feature on the Royal Air Force’s photo-reconnaissance Spitfires, highlighting the unusual camouflage colours used by the wartime unit, including PRU Blue and PRU Pink. The piece explains how the specially adapted aircraft were painted to improve concealment at different altitudes and in different light conditions during World War II, giving the familiar fighter a less familiar role in British reconnaissance operations.
PRU Blue was used on aircraft operating at medium to high altitude, where the colour helped them blend into the sky during long-range missions. PRU Pink was reserved for aircraft flying low at dawn or dusk, when a pale pink finish could merge with pink and orange skies as well as cloud formations. The shade was used only by photo-reconnaissance aircraft, and its purpose was practical rather than decorative.
The feature also places the camouflage within the broader context of wartime reconnaissance, when survivability depended on reducing visual detection as much as possible. By adapting Spitfires for the Photo Reconnaissance Unit, the RAF turned one of the most famous fighters of the war into a specialised intelligence platform with purpose-built finishes for its mission profile.