The Flint Grey hue itself gets its name from the color of a kind of sedimentary rock that is also called chert, but it is otherwise simply known as flint. At one time, basic tools, such as knives and the tips of spears, were made from flint. Striking flint against hardened steel can also produce fire and it is used for this purpose by campers and people spending time in the great outdoors. Usually, flint appears to be black- or dark grey-colored, which is the reason there is a hue named Flint Grey. However, it may also appear in a combination of maroon, tan, white and/or yellow shades.