Your Facebook friends may be falsely identifying themselves as tetrachromats, thanks to a color test that has been making the rounds. After the color controversy over a black and blue dress, or is … ...

The test explains the variations in colors that different people see. Derval says the amount of colors you see depend on the number and distribution of cones or color receptors in your eyes.

A new optical illusion shows a series of fuel pumps that appear to change in color down rows. However, a concept that places lines in the background is tricking your brain.

The test explains the variations in colors that different people see. Derval says the number of colors you see depends on the number and distribution of cones, or color receptors, in your eyes.