Tyrian purple the Iles Purpuraires at Mogador, in Morocco. The sea snail harvested at this western Moroccan dye production facility was "Hexaplex trunculus" (mentioned above) also known by the older name "Murex trunculus". This second species of dye murex is found today on the Mediterranean and Atlantic coasts of Europe and Africa (Spain and Portugal, Morocco, and the Canary Islands). The colour-fast (non-fading) dye was an item of luxury trade, prized by Romans, who used it to colour ceremonial robes. Used as a dye, the color shifts from blue (peak absorption at 590 nm, which is yellow-orange) to reddish-purple (peak absorption at
HMS Tyrian (R67) HMS Tyrian (R67) HMS "Tyrian" was a S-class destroyer built for the Royal Navy during the Second World War. "Tyrian" displaced at standard load and at deep load. She had an overall length of , a beam of and a deep draught of . She was powered by two Parsons geared steam turbines, each driving one propeller shaft, using steam provided by two Admiralty three-drum boilers. The turbines developed a total of and gave a maximum speed of . "Tyrian" carried a maximum of of fuel oil that gave her a range of at . Her complement was 170 officers