What's the difference between ancient colors and clothing colors?

It is the official dress color system of the Tang Dynasty that stipulates the color, which is a summary and specification of the traditional dress color culture made by the unique color aesthetics of the Tang Dynasty.

"Three or more official uniforms are purple, five or more red, six or seven green, eight or nine green." This system is mainly aimed at official uniforms. Uniforms were formed in the Southern and Northern Dynasties, born out of Xianbei costumes, and gradually replaced the sleeves in the Han and Wei Dynasties. The method of visually indicating the status grade with four colors, namely purple, red, green and cyan, did not originate from Wei Chuantong in Han Dynasty, but absorbed the customs of the northern nationalities, and became more and more complete with the continuous development in Sui and early Tang Dynasties. However, while it is becoming more and more strict, all kinds of overstepping behaviors are also destroying the color system of official uniforms in the Tang Dynasty.

The color system of official uniforms in the Tang Dynasty clearly stipulates that the clothes worn by officials of different grades have obvious grade boundaries. What stands out behind is that the social organizations in ancient China are constantly changing, and the blood relationship has not been fundamentally touched. This is also the secret of the ethicalization of ancient feudal society in China, which leads to the connotation of etiquette ethics culture.