What is the colour of the outline - blue or red?, Viral News, Times Now
The boxes aren't moving… : r/blackmagicfuckery
Optical Illusions - THIS LITTLE CLASS OF MINE
The Power of Afterimages in the Mind
12 fascinating optical illusions show how color can trick the eye - The Washington Post
Are you one of the people who can't see this optical illusion? – The Irish Times
The Physics of Light and Color - Human Vision and Color Perception
8 Factors That Influence How You See Colors
Everyone sees this optical illusion differently, so does the outline look red or blue to you?
Optical Illusions daily — What you see first in this mind-bending image reveals your main personality trait
Optical Illusion: Not Everyone Can Spot The Hidden Depth In This Image!
optical illusion image see first reflects dominant personality traits
Why you should always question your perceptions
Does everyone see colors differently? Is there a way to tell and how do we name a color? - Quora
