Purple and violet refer to colors that are between red and blue in hue, with purples closer to red and violets closer to blue.
Here is the long history of purple color. Purple first appeared in prehistoric art during the Neolithic era. The artists of Pech Merle cave and other Neolithic sites in France used sticks of manganese and hematite powder to draw and paint animals and the outlines of their own hands on the walls of their caves. These works have been dated to between 16,000 and 25,000 BC. — Wikipedia