PURPLE (ropclApa), the name given by the ancients to a dye derived from various species of Murex and Purpura. (See MOLLUSCA, vol. xvi. p. 648 sq. ; DYEING, vol. vii. p. 571 ; and PHCENICIA, vol. xviii. p. 804.) For the modern sources of the various shades of this colour, see DYEING, vol. vii. p. 579.