Your Color Red Really Could Be My Blue | Color Perception | Live Science

About 1 per cent of American men suffer from red-green colour blindness.

Recent experiments challenge the accepted notion that all of us have the same default perception of the colours we see. A person’s red could be the other person’s blue, technically, but still carry with it the same feeling.

Example: The colour of blood (deep red) or the blue sky could seem different to some people while carrying the same feeling or emotion when they encounter it.

• The colour-sensitive receptors that humans have, called melanopsin, measure the amount of blue or yellow light in the atmosphere and likewise regulate our circadian rhythm.
• Human beings have Cone Cells, which are of three types, Red, Blue, and Green, and have evolved much later than the receptors in the brain.