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
Christ Church School 12. Kindergarten students wear Persian coloured checked shorts, and a Persian blue shirt attached to the shorts, while girls wear Persian blue dress. Boys, up to the 7th grade, wear white shorts, white half-sleeved shirts, school belt, black shoes, and the school tie (which is dark bottle green with a thin yellow stripes running diagonally). The students usually pin a badge of their house name (and the house colour on the background) to their tie or their pockets. From the 8th grade onwards, boys wear full white trousers, a white half- sleeved shirt, the green and yellow striped school belt