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
Legend of the Five Rings five interlocking rings. The only way to completely resolve the issue was to quit using the symbol. For the role-playing game this meant very little, but for the collectible card game it meant that the backing of the cards had to be redesigned, which left players with a mix of cards that essentially resulted in marked decks. In an attempt to appease the players, Wizards released the first set with the different backs – Spirit Wars – bundled with opaque sleeves that would obscure the designs on the backs of the cards, allowing players to use any mix of cards