This Color Isn’t Real—But Science Makes It Visible

Can your brain be tricked into seeing a color that doesn’t actually exist?

In this mind-bending Short, we explore a groundbreaking experiment where scientists used lasers to stimulate a very specific type of cone in the human eye—something that never happens naturally. The result? Participants reported seeing a completely new color, one our eyes are physically incapable of perceiving on their own.

Here's how it works:
Our eyes have three types of cone cells—short, medium, and long—that detect different wavelengths of light. The medium cone is special because it’s never activated by itself in the real world. But using precise laser technology, scientists isolated that single type, effectively tricking the brain into creating a new visual experience.

The color is being called “olo”—and while most of us will never see it without laser stimulation, test subjects described it as resembling a supersaturated blue-green unlike anything else.

So... did they invent a new color? Not quite—but what they did is even cooler. They uncovered a loophole in how our vision works, showing how perception and reality don’t always line up.

Want to know what “olo” looks like? The closest estimation is displayed at the end of this Short—but remember, without the laser, you’re only seeing a simulation.

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That’s Life: https://www.youtube.com/playlist?list=PLxeUBLGfcIB_8ldL-GfepGOzigQBGvbjg

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