The Pros & Cons of Different Eye Colors (A Guide) – NVISION Eye Centers (2024)

Most people have brown, blue, or hazel eyes, but there are other eye colors too.

Table of Contents

  • The Science
  • Common Eye Colors
  • Rarest Eye Colors
  • Heterochromia
  • Eye Color Spectrum
  • Human Eye Color Chart

While some mild health benefits and detriments have been linked to eye color, more research is needed. Overall, it is likely that eye color usually has minimal impact on a person’s health.

Two exceptions are albinism, which can cause a person to be significantly sensitive to light, and heterochromia, which is sometimes a sign of more serious health conditions.

The Science Behind Eye Color

Many people believe eye color is determined solely by a single gene, even having been taught as much in school.

The common misconception, once believed as fact by scientists, is that eye color was determined by one gene that expressed as brown (a dominant gene) or blue (a recessive gene). But we now know it is much more complicated than this.

The Pros & Cons of Different Eye Colors (A Guide) – NVISION Eye Centers (1)

A person’s eye color is actually an expression of dozens of genes (over 60, according to one study). Even among people with the “same” eye color, such as blue, these genes can create subtle differences that mean your eye color is as unique as your fingerprints.

The actual pigment that gives the eye color is called melanin, which darkens your eye color. The gene groupings that cause your eye to have more melanin are the most common, which is why brown is the most common eye color. Brown was also the first eye color in human beings, with the rest coming later as genetic mutations.

The Most Common Eye Colors

Brown is the most common eye color both worldwide and in the United States, with more than half of people in the world having brown eyes. Because of where later genetic mutations originated, lighter eye colors almost exclusively exist among populations with European ancestry.

Brown eyed-genes are also generally dominant, meaning a person with brown eyes who produces a child generally has a greater than even chance of producing a child who also has brown eyes.

The second most common eye color is blue, with an estimated 17 percent of the world’s population having blue eyes. Blue-eyed genes are generally recessive.

It was once believed two blue-eyed people could not produce a brown-eyed child, meaning it was previously thought it might be a sign of infidelity if a child attributed to such a couple had brown eyes. This is not valid, and the reality is more complicated. It isn’t common for two blue-eyed parents to produce a brown-eyed child, but it is possible.

The Pros & Cons of Different Eye Colors (A Guide) – NVISION Eye Centers (2)

The Rarest Eye Colors

When discussing rare eye colors, it is common for people to bring up other colors they’re likely to have still seen in the general population of their community or at least on television. Eye colors such as green and hazel are rare but they aren’t actually the rarest.

The rarest eye colors are the result of extremely uncommon genetic mutations. For example, a mutation in the FOXC2 gene is thought to be the reason some people are born with violet eyes.

Another rare eye color, which might be called pink or red, is the result of albinism. A person born with albinism has almost no melanin in their skin, hair, and irises. In addition to giving a person naturally very pale skin and bright blonde or white hair, this also means their eyes have an unusual reddish or pinkish hue, although this unfortunately has the side effect of making them very sensitive to sunlight.

Heterochromia

Some people are born with or develop a condition called heterochromia. This is when a person has a different eye color in each eye, most commonly brown and blue.

Some people develop heterochromia as a result of injury or another eye health complication. If a child or adult develops heterochromia, they should see an ophthalmologist, as it can sometimes signal more serious health complications.

However, heterochromia usually isn’t serious and requires no treatment on its own if no other health conditions are detected.

The Eye Color Spectrum

Eye colors, like all colors, exist on a spectrum. In addition to broad color categories like blue or brown, eye colors can also be different shades.

A person’s eyes might be one of virtually infinite shades, many very difficult to distinguish from each other, depending on the specifics of their genetics.

Do Different Eye Colors Have Different Benefits?

Because of the sometimes simplified way concepts like genetics and Darwinism are taught, we might reasonably assume there is a survival-based reason various eye colors developed and survived in various human populations. While research is ongoing, this doesn’t seem to be the case.

Of all eye colors, brown seems to be the only one that could be called “advantageous” from a survival perspective. While more research is needed, darker irises are linked to a number of health benefits, including these:

  • Reduced risk of macular degeneration
  • Lower melanoma risk

Lighter eyes may have some advantages too, but they are also linked to certain health and addiction risks. People with lighter eyes may have the following:

  • A lower chance of developing vitiligo
  • A higher risk of abusing alcohol
  • Greater light sensitivity, especially among people with albinism

Notably, the potential differences in health impacts between different eye colors are almost certainly slight. The reason different eye colors have managed to survive is largely because they didn’t significantly impact the survivability of the early humans who developed them.

Most potential benefits that might come from eye color are social. Some people find different eye colors more attractive or interesting. Different eye colors also make humans more diverse, which is arguably a positive where it doesn’t significantly impact health.

Human Eye Color Chart

The following is a chart listing the estimated rate of each eye color in the general population. Note that because eye color is genetic, the specific ratio of eye color in a given community can vary significantly from these numbers:

ColorRate of Occurrence
Brown>50%
Blue~8% – 10%
Hazel~5%
Green~2%
GrayUnknown (<1% – ~3%)
Red/PinkUnknown (<1%)
VioletUnknown (<1%)

References

  1. 4 Things Your Eye Color Might Reveal About Your Health. (January 2020). The Healthy.
  2. Eye Color: Unique as a Fingerprint. (December 2017). American Academy of Ophthalmology.
  3. Heterochromia. (April 2021). American Academy of Ophthalmology.
  4. Is Eye Color Determined By Genetics? MedlinePlus.
  5. Rare Eye Colours You Didn’t Know About. (October 2021). Feel Good Contacts.
  6. This Is Exactly How Many People Have Blue Eyes. (December 2018). Yahoo.
  7. What Colour Are Your Eyes? Teaching the Genetics of Eye Colour & Colour Vision. Edridge Green Lecture Rcophth Annual Congress Glasgow. (May 2019). Nature.
  8. Your Eye Color, Explained. (February 2022). Discover.
  9. Is Eye Color Genetic? | What Your Eye Color Has to Do With Your History. (June 2019). Luna.
  10. True Colors: A Literature Review on the Spatial Distribution of Eye and Hair Pigmentation. (March 2019). Forensic Science International: Genetics.

The information provided on this page should not be used in place of information provided by a doctor or specialist. To learn more, read our Privacy Policy and Editorial Policy pages.

The Pros & Cons of Different Eye Colors (A Guide) – NVISION Eye Centers (2024)

FAQs

Are there advantages to different eye colors? ›

Those with darker colored eyes experience less visual discomfort in bright, sunny conditions. Also, darker irises reflect less light within the eye, reducing susceptibility to glare and improving contrast discernment—so people with darker eyes may have better vision in high-glare situations, such as driving at night.

What eye color is most likely to have bad vision? ›

As of now, the commonly accepted theory is that eye colour has no real effect on vision quality. It's significant to note that while people with lighter eyes may have increased light sensitivity, those with dark eyes should still make it a point to wear sunglasses whenever they set foot outside.

Which eye color has the best vision? ›

While lighter-colored eyes may be more sensitive to sunlight, they are not necessarily more sensitive to vision. In fact, blue eyes have better visual acuity than brown eyes. This means that blue-eyed people can see small details more clearly.

What eye color has the best night vision? ›

People with blue eyes may have better sight in dim conditions than those with brown eyes, according to LJMU research reported in New Scientist. The theory could explain why the colour has persisted in certain populations, for example in Northern Europe where skies are darker.

What is the most attractive eye color? ›

When broken down by gender, men ranked gray, blue, and green eyes as the most attractive, while women said they were most attracted to green, hazel, and gray eyes. Despite brown eyes ranking at the bottom of our perceived attraction scale, approximately 79% of the world's population sports melanin-rich brown eyes.

What is the most trusted eye color? ›

Summary: People view brown-eyed faces as more trustworthy than those with blue eyes, except if the blue eyes belong to a broad-faced man, according to new research.

What's the healthiest eye color to have? ›

Of all eye colors, brown seems to be the only one that could be called “advantageous” from a survival perspective. While more research is needed, darker irises are linked to a number of health benefits, including these: Reduced risk of macular degeneration. Lower melanoma risk.

What is the most unliked eye color? ›

Green is considered by some to be the actual rarest eye color in the world, though others would say it's been dethroned by red, violet, and grey eyes. Green eyes don't possess a lot of melanin, which creates a Rayleigh scattering effect: Light gets reflected and scattered by the eyes instead of absorbed by pigment.

What is the least attractive eye color? ›

And what would you think is the most attractive eye color? In a website poll of over 66,000 respondents, 20% said green was the most attractive, followed by hazel and light blue at 16%. Brown was far and away voted the least attractive (6%).

What color is most attractive to the human eye? ›

Red and orange seem to be the clear winner when it comes to eye-catching colors. These colors tend to stand out and are therefore used on many warning signs or safety equipment. Yellow is another color that comes in a close second to red and orange in popularity.

What eye color is most likely to need glasses? ›

People with lighter-colored eyes are more likely to have nearsightedness (or myopia) than those with darker-colored eyes. Nearsightedness occurs when the eyeball becomes too long or curved, causing light to focus on a point just before reaching the retina instead of directly on it.

What is the most eye friendly color? ›

Yellow light has been shown to be effective in protecting the retinas of patients with overexposure to blue light because it produces the best contrast. Sunglasses with yellow lenses are quite effective not only at filtering ultraviolet rays but also blue light.

What is the strongest eye color? ›

The allele for brown eyes is the most dominant allele and is always dominant over the other two alleles and the allele for green eyes is always dominant over the allele for blue eyes, which is always recessive.

What eye color is the most sensitive to light? ›

Lighter-colored eyes have less pigment to protect against sun damage and UV radiation compared to darker-colored eyes. This means that people with green, hazel, or blue eyes are more sensitive to light and more susceptible to UV damage.

What are the benefits of different eye colors? ›

People with brown eyes have more melanin present in their iris, which insulates connections between brain cells and can cause them to fire more rapidly than their light-eyed counterparts. If you have brown eyes, studies also show that you might be less likely to develop macular degeneration.

What eye colour is the healthiest? ›

Of all eye colors, brown seems to be the only one that could be called “advantageous” from a survival perspective. While more research is needed, darker irises are linked to a number of health benefits, including these: Reduced risk of macular degeneration. Lower melanoma risk.

What's the evolutionary advantage of different eye colors? ›

There's also the idea that blue eyes were advantageous because they perceive stationary objects better than moving things. This could have been an advantage to hunter gatherer women who needed to identify and collect plant foods — indeed blue eyes may even have evolved in women first.

What eye color is the strongest? ›

The allele for brown eyes is the most dominant allele and is always dominant over the other two alleles and the allele for green eyes is always dominant over the allele for blue eyes, which is always recessive.

What is the hardest eye color to get? ›

Red or Violet Eyes

But it's the blood vessels within the eye (not actual red or violet pigment) that are responsible for their appearance. This eye color happens as a result of albinism, a genetic condition that limits or entirely prevents the body's production of melanin.

References

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