Color Wheel (Moses Harris, Moses Harris's chart was the first full-color circle. The 18 colors of his wheel were derived from what he then called the three 'primitive' colors: red, yellow and blue. At the center of the wheel, Harris showed that black
Color chips representative of A. Faber's various Wax Crayons or Creta Laevis Pencils. Kenneth Franzheim II Rare Books Room, William R. Jenkins Architecture and Art Library, University of Houston Libraries (Public Domain).