The basics American Crew Gray Shampoo, works to minimize yellow tones that gray hair can get due to minerals in the water, impurities in the air and product buildup. The benefits Helps to minimize yellow tones in hair. Smoothes and softens, helps absorb and retain moisture. Adds sheen and conditions to the hair. Contains CI 60730 (Ext. Violet 2). The uses Easily remove brassy yellow tones from gray (or graying) hair. The bottom line Keep your gray looking it's finest.