[giorgosts]

The greek language is not dead, it is still spoken by about 15 mil. people worldwide. "Porfyro" is the deep red color that can be frequently experienced in esp. greek orthodox churches (even in apparell dating many hundreds of years), and "Glauco" is the shiny blue of the aegean sea that made the greek islands famous worldwide.

The words that the greeks used (and still use) have the purpose of describing the natural world, not of scientificaly defining colors according to a theory of vision.

Even the modern theory of color vision acknowledges the principles of color constancy and color adaptation.