What do you mean by taking off your blue coat and changing into a purple robe?

2, the red robe is the official uniform;

3. Purple robes are purple robes, which are held by senior officials;

4. The whole meaning of changing from blue to purple is that people are a little arrogant. Early admission, reputation, and average luck. After the age of 36, he began to develop. He took off his clothes and put on official clothes.