Who knows what the color of the roof of an ancient building stands for?

Yellow (especially bright yellow) glazed tile roof is the most distinguished, which is dedicated to the emperor and is also a building specially approved by the emperor (such as Confucius Temple). Except for a few special requirements, all buildings in the palace, regardless of size, are yellow glazed tiles. Below the palace, the temples, palaces and temples are mixed in yellow-green (trimmed), green and cyan-gray; Residential buildings have the lowest grade, and only gray pottery tiles can be used. The temples and walls of the main buildings are all red, the wooden structures of the secondary buildings can be green, and the houses and gardens are a mixture of red, green, brown and black. Liang Fang, Gong Dou and Rafter painted many colorful paintings, mainly blue and green, with gold, red and black in the middle. The grades were distinguished by the number of gold and dragons.