A color sphere has a plurality of organized color cells. The color cells are gradually lighter from a bottom to a top. A first color cell is selected from the color sphere. Radial, horizontal peripheral, vertical peripheral directions are identified relative to the first color cell. The color cells of the sphere are organized so that they only match in the radial direction, horizontal peripheral direction and in the vertical peripheral direction. A second color cell is selected only when the second color cell is in selected direction.