I am a teacher. . But I don't know what color to dye my hair. . You can look foreign without exaggeration.

Your best choice is brown, which will look solemn and fashionable. Be solemn, because you are a teacher, if you dye green, purple, red, white, etc. The headmaster and parents may have opinions. It's really strange to see this color of hair at school. Fashionable, because many foreigners have brown hair, which will make them look foreign and unobtrusive. In fact, the key to keeping hair from getting yellow is nursing. There seems to be a conditioner that dyes different colors. Every time you wash your hair, you need to use these conditioners to protect your hair from yellowing.