purple: the costly red-violet cloth dyed from sea snails, and the clothing made from it, worn as a mark of royal rank or great wealth
Purple in the New Testament is closer to a price tag than to a color. The word names cloth colored with a dye squeezed a drop at a time from the glands of Mediterranean sea snails, and the quantities were absurd: thousands of shells yielded barely enough dye for the trim of one garment. The finest double-dipped grade from Tyre was reckoned worth its weight in silver. That cost, and not the shade, is what a first century listener heard.
Because only rulers, officials, and the very rich could dress in it, the cloth worked as a uniform. Rome had built a whole visible ranking system out of it, from a narrow colored stripe on an official's tunic up to the solid purple cloak an emperor alone wore. The Greek Old Testament had already used this same word for the red-purple (ארגמן) woven into the tabernacle curtains and the high priest's clothing, and Greek kings later granted Jewish high priests the right to wear purple as a mark of near royal standing. So the word reaches the New Testament carrying both throne and sanctuary.
It covers the fabric itself as well as a garment made from it, which is why it can name a bale of goods in a ship's cargo and a robe thrown over someone's shoulders. What shifts from place to place is who wears it and why:
- Soldiers drape it on Jesus to stage a mock coronation, dressing a condemned prisoner in the color of a king.
- A rich man in one of Jesus's parables puts it on every single day, the stock picture of a life of luxury.
- Merchants weep over it when a great city falls, because purple was one of the goods that had made them rich.
Ancient color words also did not work the way modern ones do. Purple could describe anything from deep crimson through violet to a red so dark it looked almost black, because the word pointed to the snail dye and its shimmer rather than to a fixed place on a color chart. That is why Mark can call the cloak thrown on Jesus purple while Matthew calls the same garment scarlet (κόκκινος) without either being wrong.