REVLON HAIR COLOR SILK 31 DARK BROWNHEALTH & BEAUTY HAIR COLOR & DEVELOPER REVLON Weight: REVLON HAIR COLOR SILK 31 DARK BROWN is a permanent hair color that provides dark brown pigment with a silk finish. The unique formula creates beautiful, natural looking results that are safe for all hair types. With Silk 31, you can achieve the perfect shade without harsh chemicals or ammonia. Revlon has revolutionized hair coloring with its 31 Dark Brown colors. This revolutionary product