Abstract: Color wheel comprising 3 transparent overlaid discs with circumferential arrays of primary color gradation on each such disc, the colors being overlappable when the discs are moved relative to each other to define thousands of combinations and arranged so that in primary positions of the three discs, which are transparent, the color wheel forms perfect complements, triads, quartets, sextets, etc. and in almost all relative positions perfect and equal increments of analogous gradations of different color schemes (at all arcs where colors are changing). In each disc there is a 240-degree sweep of each primary color comprising a central 120 degrees of 100% intensity of the primary color decreasing in each 60-degree band of the side of the central 120-degree bands from 100% to 0 intensity at the outer edges of the 240-degree band.