The three circles drawn in this photo seem like they are different shades of blue, but are in fact all the same color. Lenstore While many mind-blowing optical illusions can play with your brain — ...

From the cigar nestled in the brickwork to 'The Dress', many optical illusions have baffled viewers over the years. But the latest illusion is arguably one of the most mind-boggling yet. The illusion ...

Purple is a non-spectral color created by the brain from red and blue signals Individual differences in eyes and brain make each person see colors uniquely All colors we perceive, including purple, ...