Chroma Silk’s low-ammonia formula employs a proprietary blend of human hair keratin amino acids and pure silk protein to provide protection, added strength and unparalleled shine. Hydrolyzed silk amino acids, because of their small molecular weight and affinity to adhere to the hair fiber, act as “carrying agents” to help drive color deep into the hair fiber, providing unmatched color vibrancy and durability. ChromaSilk Hair Color is the finest, most versatile hair color in the professional industry. ChromaSilk's superior dye load ensures complete grey coverage and rich vibrant colors. 3 oz. tube.