Paul Mitchell The Color 4RB 3oz - Red Natural Brown Paul Mitchell The Color 4RB is a special product giving a Red Natural Brown color to your hair. Paul Mitchell offers a full spectrum of inter-mixable colors, and high lift colors, and ultra toners. It is a low ammonia, permanent or semi-permanent hair color developed with a beeswax base and other natural conditioners. It also provides long-lasting natural-looking hair color with outstanding shine and condition.