Just like the gold or blue dress illusion, can you guess the color of these balls? Are they red, green, or blue? This new optical illusion by Professor David Novick from the University of Texas at El Paso plays a trick on your mind: The balls are all of the same color: light-brown. (RGB 255,188,144) Shrinking the image increases the effect:
A three-color confetti illusion with spheres, which appear to be yellowish, reddish, and purpleish but in fact have exactly the same light-brown base color (RGB 255,188,144). Shrinking the image increases the effect. Original png file is at https://t.co/6r2PMbLMJc. pic.twitter.com/ro1zpVxLm2
— David Novick (@NovickProf) June 14, 2019
The reason this illusion works is because our brains not only process colors individually but also within the context of nearby colors.