Clairol Professional Beautiful Collection Semi-Permanent Color in Rich Dark Brown [2A] is a gentle and effective hair color solution that can cover up to 50% gray hair. With no ammonia or peroxide, this semi-permanent hair color is gentle enough to be used right after relaxing. Featuring Advanced O2 Technology, this hair color provides twice the coverage for twice as long, lasting up to 12 washes. All shades effectively cover up to 50% gray hair, making it a great choice for those looking for a natural-looking hair color that lasts.