Using an experimental technique called "Oz," researchers stimulated the human retina such that people saw a brand-new color.

A team of scientists believes they have discovered a new color outside the range of human vision. They named the color “olo” ...

"It is not a new color," John Barbur, a professor of optics and visual science at City St George's, University of London, ...

Some people see the world differently. Literally. It's a phenomenon called color blindness. It's not just people who can' see color at all. Some people just can't see as many colors as the rest of us.