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American Focus > Blog > Tech and Science > Scientists Say They Found a New Color Humans Have Never Seen Before : ScienceAlert
Tech and Science

Scientists Say They Found a New Color Humans Have Never Seen Before : ScienceAlert

Last updated: April 22, 2025 8:25 pm
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Scientists Say They Found a New Color Humans Have Never Seen Before : ScienceAlert
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Scientists Develop Prototype to Expand Human Color Vision Beyond Natural Limits

Researchers at the University of California, Berkeley and the University of Washington have made a groundbreaking discovery that could revolutionize the way we perceive color. For the first time, humans have been able to catch a glimpse of a rainbow of colors that exist just beyond our natural sight, including a “blue-green of unprecedented saturation”.

Unlike anything we have ever seen before, these colors exist in a space that is inaccessible to our eyes. However, through a new prototype called “Oz”, scientists have found a way to artificially expand the natural human color gamut by hijacking the retina.

The Oz prototype works by flashing a laser light with a single monochromatic color, usually perceived as green, directly at individual color-capturing cone cells in the retina. This targeted stimulation of the cone cells allows for the creation of color messages that the brain is unfamiliar with, leading to the perception of new and unprecedented hues.

In experiments with participants, the researchers were able to demonstrate the effectiveness of the Oz prototype. By targeting specific cone cells with the laser light, participants reported seeing colors that were completely unknown to them. They struggled to match these new colors with traditional red, green, and blue light, requiring the addition of white light to desaturate the hue.

The team named the new color that participants saw “olo”, which has no visible counterpart in the natural color spectrum. Through further experiments involving moving dots and targeted cone cell stimulation, participants were able to perceive a wide range of colors beyond the natural human gamut, including brilliant red lines and rotating dots on an olo background.

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While the researchers believe that their work provides unequivocal proof of a new color spectrum, some experts remain skeptical. Vision scientist John Barbur from the University of London acknowledges the technological feat of targeting specific cone cells but raises concerns about the potential impact on perceived brightness and the creation of truly new colors.

Despite some limitations in the prototype, such as colors being perceived at the edge of vision due to targeting peripheral cone cells, the team is optimistic about the potential applications of the Oz technology. They hope to further explore its capabilities in probing the visual system at a cellular level and potentially developing treatments for color blindness.

The study detailing the groundbreaking research was published in Science Advances, marking a significant advancement in the field of vision science and neuroscience. The Oz prototype represents a new experimental platform that aims to achieve complete control of the neural processes involved in color perception, offering exciting possibilities for future research and innovation in the field.

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