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
Green Dot (symbol) Green Dot (symbol) The Green Dot () is the license symbol of a European network of industry-funded systems for recycling the packaging materials of consumer goods. The logo is trademark protected worldwide. The Green Dot was a system thought up by Klaus Töpfer, Germany's environment minister in the early 1990s. The basic idea of the Green Dot is that consumers who see the logo know that the manufacturer of the product contributes to the cost of recovery and recycling. This can be with household waste collected by the authorities (e.g. in special bags - in Germany these are yellow), or