Taoism has a close relationship and influence with the traditional culture of China. For example, Taoism likes yellow very much, so in ancient times people called Taoism the crown of yellow, while in ancient times, yellow was the color used by the royal family. Besides yellow, Taoism also advocates cyan and purple. In the folk, people think that purple is a symbol of good luck.
You may find that the colors of Taoist costumes are mostly blue, and the places where they live are covered with blue plants. This is because in Taoist theory, "wood, fire, earth, gold and water" complement each other, and they also correspond to five colors: green, red, yellow, white and black. Green is the life and symbol of the East. Taoism prefers longevity and hopes to achieve the purpose of prolonging life through cultivation, which can be seen from their frequent use of big bones for health preservation. So Taoist priests wear simple clothes, blue headscarves and blue robes.
Taoism is the knowledge of Huang Lao. Yellow refers to the Yellow Emperor. In the five elements, the color of soil is yellow, so people admire yellow very much in both Taoism and the secular world. In traditional culture, "yellow" also represents health and longevity. Laozi is the ancestor of Taoism. It is said that when he passed through Hangu Pass, Yin found purple air in the sky. Soon, I passed Hangu to Qingniu. The clothes given by the ancient emperors to Taoist priests were mostly purple, representing auspiciousness and nobility. At the ceremony, the mage also wore purple robes embroidered with auspicious patterns such as cranes, sun, moon and stars.