'Purple' in the Bible

The king called aloud to bring in the conjurers, the Chaldeans and the diviners. The king spoke and said to the wise men of Babylon, “Any man who can read this inscription and explain its interpretation to me shall be clothed with purple and have a necklace of gold around his neck, and have authority as third ruler in the kingdom.”

But I personally have heard about you, that you are able to give interpretations and solve difficult problems. Now if you are able to read the inscription and make its interpretation known to me, you will be clothed with purple and wear a necklace of gold around your neck, and you will have authority as the third ruler in the kingdom.”

Then Belshazzar gave orders, and they clothed Daniel with purple and put a necklace of gold around his neck, and issued a proclamation concerning him that he now had authority as the third ruler in the kingdom.