Pakistan, April 21 -- Researchers in the United States have found a new color that no one has previously seen. This vivid blue-green shade is called "olo." Scientists observed it during an experiment using laser pulses to stimulate the retina in a unique way.

The study, published in Science Advances, involved five people with normal vision. Researchers used specialized equipment to target the retina's M-cone cells, which sense medium wavelengths of light. This stimulation does not occur in everyday life, leading to perceptions unlike anything participants had seen before.

Professor Ren Ng from UC Berkeley, a co-author and participant, described the experience as transformative. He compared it to seeing a bright red after only knowing pa...