Not only in clothing, but also in the color of the princesses' lingshi. Even when princesses lose their fairy spirit and use magic to fight against bad people, they can clearly distinguish their identities through colors.
About the daughters of the heavenly queen:
In the myth of the seven fairies, the heavenly queen Yi * * has seven daughters.
We know from the Journey to the West that the names of the seven fairies are: Red Fairy, Tsing Yi Fairy, plain clothes Fairy, Soap Fairy, Purple Fairy, Yellow Fairy and Green Fairy. Their names correspond to each other: Zhang Tianshou in red, Zhang Tianyang in Tsing Yi, Zhang in plain clothes, Zhang Tianchang in Soap Clothes, Zhang Tianxian in Purple Clothes, Zhang Tianqing in Yellow Clothes and Green Clothes.
However, after all, it is a fairy tale, and the daughter's name and address are different in each work.