5 This is the result of overlapping three primary colored circles in Inkscape, then reducing opacity in varying degrees, then adding other overlapping circles with the […] 20121223: a study in primary color theory by John LeMasney ...2012-12-23 in Illustration / portfolio tagged Color / Creative Commons / CrunchBase / GIMP / Inkscape / John LeMasney / Open source / Typography / WordPress by lemsy (updated 1594 days ago)