Revlon Hair Color Dark brown color is intense and vibrant and gives your hair a three-dimensional, naturally brown tint, instead of looking flat and artificial. It can be used to dye a full head of hair or to touch up grey roots. Longer and lighter hair is the most attractive on Caucasian women, a study has found. Both lighter brown hair and lighter blonde hair are seen as more attractive than darker or black hair. Lighter hair increases men's ratings for youth, health, and attractiveness in a woman.