What is the name of the purple cassock fortune teller?

What does the purple cassock of Taoism represent?

Purple symbolizes nobility and auspiciousness in Taoism.

Purple has always been the most legendary color in Taoism. In Taoist groups, there has always been an idiom that "purple gas comes from the east", which means that when Laozi went out to Hanguguan in the west, the stone guarding the city saw purple gas coming from the east to the west for three thousand miles. Emperors of past dynasties also liked to reward Taoist priests with purple robes.