The medical term for hair graying is canities. Hair turns gray (or white) when your hair follicles stop creating melanin. Melanin is the substance that gives your skin and hair color.
In GH Beauty Lab testing, this Schwarzkopf dye was a star in deep shades like brown and black. These dark hair colors were true to the images on the packaging, the best at initial gray coverage ...
Better yet, if you are about that DIY life and are looking to merely make a few errant gray hairs disappear, then—ding ding!—you happen to be the perfect candidate for an at-home hair dye attempt.