Hexaplex trunculus degrades, resulting in blue only. Nonetheless, archeologists have confirmed Hexaplex trunculus as the species used to create the purple-blue dye; large numbers of shells were recovered from inside ancient live-storage chambers that were used for harvesting. Apparently, 10- to 12,000 murex yielded only one gram of dye. Because of this, the dye was highly prized. Also known as "Royal Purple", it was prohibitively expensive and was only used by the highest ranking aristocracy. A similar dye, "Tyrian purple", which is purple-red in color, was made from a related species of marine snail, "Murex brandaris". This dye (alternatively known as "imperial
British Colour Council each colour. BCC colour codes define colours as varying by hue, tone and intensity, and were originally designed for use in the textile dye industry. The colour names given by the BCC were particularly descriptive and often referred to flora or fauna, with titles such as Larkspur ("No. 196"), Forget-Me-Not ("No. 84"), Bee Eater Blue, Kermes, and Squirrel. The codes of the BCC became standards for identifying colours used in everything from the Royal Horticultural Society, to British government planning commission maps, the British Army, Royal Institute of British Architects, and the Royal Mail. BCC codes, due to their subtlety