Red is one of the oldest colors still in use. For example, artists continue to use red ochre, which was originally used for prehistoric cave drawings. The pigment is made from clay that turns red after being mixed with a mineral.
A deep red ochre called sinopia — named for the ancient Greek city where it was mined — became a valuable and expensive pigment representing power and victory. Women in ancient Egypt used sinopia in makeup. During the Renaissance, Leonardo da Vinci, Rembrandt van Rijn, and many other artists used it. It also is still in use today.
Read more about the color red at Mental Floss.