Blue could also mean dark green, violet, black or brown. The ancient Greek word for a light blue, "glaukos", also could mean light green, grey, or yellow. The Greeks imported indigo dye from India, calling it indikon. They used Egyptian blue in the wall paintings of Knossos, in Crete, (2100 BC). It was not one of the four primary colours for Greek painting described by Pliny the Elder (red, yellow, black, and white), but nonetheless it was used as a background colour behind the friezes on Greek temples and to colour the beards of Greek statues. The Romans also imported indigo
New Zealand Olympic Committee of a depiction of a silver fern (New Zealand's sporting emblem) superimposed on the Olympic Rings was created as a marketing symbol in 1979 (which was initially in all-white on a black background). It was first publicly used at an Olympic Games at the Games of the XXII Olympiad (Moscow 1980, in which observers thought that the fern was an olive branch of peace)—New Zealand competed under this flag to protest the Soviet invasion of Afghanistan. It went to its current coloured version in 1994. The NZOC (New Zealand Olympic Committee) is the National Olympic Committee for New Zealand. The