The Spanish word "púrpura" originates from the Latin "purpura," which referred to the dye made from the murex snail, prized in ancient Rome around the 1st century AD, and has cognates in Italian "porpora" and French "pourpre."
From Old English 'purpul,' borrowed from Latin 'purpura,' from Greek 'porphyra' (πορφύρα), which referred both to the Murex sea snail and to the costly dye extracted from it by crushing the snail's hypobranchial gland. The Greek word may derive from a pre-Greek Aegean or Semitic substratum — it lacks a clear Indo-European etymology, suggesting the word arrived with the dyeing technique itself, possibly transmitted by Phoenician traders. The colour was synonymous with extreme wealth and imperial power in the ancient Mediterranean: producing one gram of Tyrian purple required processing roughly ten thousand Murex snails, making the dye more expensive by weight than gold. Roman emperors