Tyrian purple by ancient authors. Not much is known about the subsequent steps, and the actual ancient method for mass-producing the two murex dyes has not yet been successfully reconstructed; this special "blackish clotted blood" colour, which was prized above all others, is believed to be achieved by double-dipping the cloth, once in the indigo dye of "H. trunculus" and once in the purple-red dye of "B. brandaris". The Roman mythographer Julius Pollux, writing in the 2nd century AD, asserted ("Onomasticon" I, 45–49) that the purple dye was first discovered by the philosopher Heracles of Tyre, or rather, by his dog, whose
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