What does it mean to take off the blue robe and put on the red one?

"Take off the blue robe and put on the red robe" means to increase the rank and rank.

This sentence comes from "the noblest flesh and blood, the first name, is thirty-six, take off your blue shirt and put on a red robe."

This is an honest, open, talented life that refuses to rest. Six brothers and sisters are powerless, and their ancestors are helpless, starting from scratch. After all, they have a lot of complicated luck and can't gather money. They have a good pair of money robbers, and neither of them makes money. This is the life of spiders weaving webs, and the moon is not round at night. After several defeats, they can only get married steadily. Unexpectedly, they were all blown by strong winds, and the initial limit was 234.

In ancient times, blue robes generally referred to scholars and red robes referred to officials.

reference data

Ancient Poetry Network: http://www.gushiwen.org/