Mountbatten pink is a color invented by and named after Admiral of the Fleet Louis Francis Albert Victor Nicholas Mountbatten (1900-1979), the 1st Earl Mountbatten of Burma, KG, GCB, OM, GCSI, GCIE, GCVO, DSO, PC, FRS, and the last Royal viceroy of India. Mountbatten was a nobleman and a Royal Navy officer (as you could probably tell from his rank and title there). In 1940 he was escorting a convoy carrying vital war supplies, when he noticed that one ship would constantly vanish from vision at twilight. This phantom ship was still painted a strange grayish pink color from pre-war days. Mountbatten became convinced that the pink was an ideal camouflage color and he had all of the destroyers of the Fifth Destroyer flotilla painted in the same shade (which not surprisingly came to be identified with him).
Mountbatten pink was a mixture of medium gray with a small amount of Venetian red. The resultant neutral pink mimicked ocean and atmospheric colors of dawn and dusk. Additionally, the German navy used pink marker dye to identify their shells, so Mountbatten pink ships often threw off spotters who were unable to tell ship from clouds of smoke (at least according to some Naval historians). One cruiser, the HMS Kenya, was even nicknamed the Pink Lady because of its color and panache.
Other British captains also painted their ships in Mountbatten pink (or used it as a component of the dazzle camouflage) either because of its effectiveness as battle camouflage, or to suck up to Lord Mountbatten, or out of genuine fondness for the surprisingly attractive lavender-pink, however the color had a critical flaw which ultimately caused the Royal navy to abandon it. Although Mountbatten pink blended into the offing at dawn and dusk, it stood out against the ocean at midday. By 1942 the color was phased out for large ships (although some smaller ships still had the color for a while). Most photos and films of the day were black and white. Imagine that some of the grim British fighting ships engaged in life & death fire fights with the Germans were actually pink!