Kohl — Kohl is an ancient cosmetic product made of powdered antimonite or stibnite and typically painted over the eyes. As a color, Kohl captures some of the rich intensity and dark glamour that the cosmetic typically provides.It falls into the dark blue-gray family, often categorized as a type of deep, desaturated blue or a very dark, neutral gray with blue undertones. You can describe it as a rich, muted, dark color that hints at the color blue without being a pure, vibrant shade.