India, April 19 -- Researchers in the United States have used lasers and advanced tracking technology to enable five individuals to see a colour no human has ever seen before.

The researchers claim that by stimulating individual cells in the retina, the laser pushed their perception beyond its natural limits, according to The Guardian.

The researchers, who have published details of the experiment in Science Advances on April 18, have named the new colour "olo."

The five people on whom the experiment was conducted described the new colour as something "blue-green", but have added that their description does not fully capture the richness of the experience.

"We predicted from the beginning that it would look like an unprecedented colour...