David Novick @NovickProf Two-color Munker illusion with small dots over large spheres, which appear to be blue and green but have exactly the same base color (RGB 49,255,233). Shrinking the image increases the effect. Original png file is at bit.ly/2O74l2I. pic.twitter.com/IoOmvBa3Va 2019-05-28 12:20:56