Opposites 1: In a standard Munker illusion, the color of the background object is "pulled" toward that of the foreground stripes. But if the background and foreground colors are opposites, then they colors seem to cancel out, which can make the background object look white. Here the background spheres appear green and white but are all actually identical (base color RGB 190 255 198). You can access the original .png file in my Dropbox folder at bit.ly/3a1RTAU.