Is Your Red the Same as My Red? The Secret of "Super Vision" in 1% of Humans (Test Included)

Here is a philosophical question that has puzzled humanity for thousands of years: Is the "red" I see the same color as the "red" you see?

It sounds like splitting hairs, but biology tells us: It's likely very different.

Human perception of the world depends entirely on the hardware configuration in our eyeballs—the Cones. Most of us are "Trichromats," but hidden among the population are rare mutants with "Super Vision" and hunters with "Color Blindness" who have been misunderstood for centuries.

The Legendary "Tetrachromats": Real-life Superpowers?

The average person's retina has three types of photoreceptor cells, corresponding to Red, Green, and Blue. Through the mixing of these three primary colors, we can distinguish about 1 million colors.

But in 2010, scientists discovered a woman known as cDa29. Her retina actually had a fourth type of cone cell (usually between red and green).

What does this mean?

• The "beige" that ordinary people see might be a mix of golden, off-white, and pale pink in her eyes.
• Theoretically, she can distinguish 100 million colors, 100 times that of an average person.

This mutation usually appears only in women (because the opsin gene is on the X chromosome). Although our standard monitors (sRGB gamut) cannot perfectly reproduce the world they see, high-difficulty color discrimination tests can still screen for those "potential super seers" who are extremely sensitive to color differences.

Do you want to know if your eyes are sharper than others?

🔗 Challenge Color Sensitivity Test

A compulsory course for designers and pilots. Find the different color in the grid and see if your color resolution can beat global users.

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Color Blindness: Not a BUG, but an Evolutionary Feature

After talking about "High-Spec," let's talk about the so-called "Low-Spec."

About 8% of men in the world are color blind or color deficient (mainly red-green color blindness). In modern society, this seems like a defect (e.g., trouble with traffic lights). But in evolutionary psychology, this is actually a survival advantage.

During World War II, the US military specifically recruited color-blind soldiers as snipers or scouts. Why? Because ordinary people are easily deceived by enemy camouflage (green leaves, yellow grass), known as "Color Camouflage." Color-blind people, however, are extremely sensitive to "contours" and "textures," allowing them to easily spot enemies hiding in the grass.

In ancient times, color-blind individuals might have been the "sharpshooters" responsible for seeing through prey's disguise.

You might be that lurking "sharpshooter." Many people with mild color deficiency don't even know they are different until they take a professional Ishihara test.

🔗 Professional Color Blindness Test

Based on the classic Ishihara Test plates. Quickly screen within seconds to see if you possess a special color vision mechanism.

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Why is There Such a Difference?

If you observe carefully, you will find: Color is actually the brain's "translation" of wavelengths.

• Birds and reptiles usually have 4 types of cones (they can see UV light).
• Most mammals (like cats and dogs) only have 2 types (their world is relatively monotonous).
• As primates, humans re-evolved trichromatic vision to distinguish ripe fruits (red) from young leaves (green).

So, whether you have the "Designer's Eye" sensitive to color or the "Hunter's Eye" sensitive to contours, there is no superior or inferior. It's just different skill trees your genes selected over the long history of evolution.

Conclusion

Next time you argue with a friend about whether "this dress is blue-black or white-gold," remember: Neither of you is wrong.

You are just using different camera models to shoot the same world.

Now, go try the tools above and see what your "camera model" really is.

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Produced by the iknowabit team. Scientific references: Cambridge University research on Tetrachromacy and related literature on evolutionary psychology.