The colours were used because the authorities were concerned that the existing stamps were being soaked off envelopes and reused, and they wished to use fugitive inks that would wash away if immersed in water; the only fugitive ink colours available at the time were lilac and green.
Victoria | Queen Victoria | Victoria (Australia) | Victoria Cross | Queen | Queen's Counsel | Queen's University | Green Day | Green Party | Victoria and Albert Museum | Queen Mary | Queen (band) | Green Bay Packers | Queen Elizabeth | Mary, Queen of Scots | University of Victoria | Queen Anne | Victoria Beckham | Green Bay, Wisconsin | Queen Latifah | Victoria Park | Green | RMS Queen Mary | Queen Elizabeth The Queen Mother | Victoria's Secret | Green Lantern | Queen Elizabeth Hall | Victoria University of Wellington | National Gallery of Victoria | Lake Victoria |