Why is Doulton a blue face?

Stands for being strong and brave to resist. Doulton is a hero who hates evil, has the meaning of home and country and is full of fighting spirit. So Peking Opera gave him a blue face representing strong and brave resistance. Facial makeup is a major feature of Beijing opera. You can see the character's personality from the color of the actor's facial makeup. For example, a red face represents loyalty and a sense of justice, a black face represents integrity and selflessness, and it also represents frankness and fortitude, a white face represents evil, a purple face represents solemnity, a golden face represents mighty and solemn immortals, and a silver face represents Machamp's chaotic gods such as goblins.