A hair color, which by some miracle now merits it's own subculture, or 'label', if you will.
Clothes: Casual-yet-cool, not Particularly noticeable (these peopole are known for their hair, not style), often jeans, a shirt which makes some reference to their Hair color, EG: 'Ginger and Proud
Hair: Ginger, duh. Normally kept natural and long-ish.
Music: Anything where the lead singer is a redhead.
Stereotype: Socially inept, Geeky, Bullied, Shy, Intelligent, Secretly-slutty-but-doesn't-let-on-to-this, good-looking in a wall flower sort of way.