During the Roman Republic, when a triumph was held, the general being honored wore an entirely purple toga bordered in gold, and Roman Senators wore a toga with a purple stripe. However, during the Roman Empire, purple was more and more associated exclusively with the emperors and their officers.[34] Suetoni36]us claims that the early emperor Caligula had the King of Mauretania murdered for the splendour of his purple cloak, and that Nero forbade the use of certain purple dyes.[35] In the late empire the sale of purple cloth became a state monopoly protected by the death penalty.[
This ain't the dark ages pal, it looks bobbins.