Rarity Eye Color Chart

Have you ever wondered about the rarity of different eye colors? Our eyes are a fascinating aspect of human biology, with irises displaying a wide spectrum of colors, from the commonest brown to the rarest green. Let's delve into the captivating world of eye color rarity with our comprehensive guide.

Eye color is primarily determined by the amount and type of melanin, or pigment, in the front part of the eye called the iris. Melanin also affects the appearance of our skin, hair, and even the color of our eyebrows. But what makes green eyes so rare, and brown eyes so common? Let's find out!

The Gradient of Eye Color Rarity

To understand the rarity of eye colors, we first need to know the different shades and their prevalence. Eye colors range from dark brown to light blue, with various shades of green, hazel, and grey in between.

Brown is the most common eye color, accounting for about 55% of the global population. This is followed by blue, with approximately 40% of people having blue or blue-grey eyes. Green and hazel are the least prevalent, representing around 2% and 5% of the world's population respectively.

Brown Eyes: The Norm

Brown eyes are so prevalent that most people assume they're the default human eye color. This is somewhat true, as everyone is born with a dark, greyish-brown color. It's only in the post-natal period that our eye color fully develops, often taking up to three years to reach its final shade.

Brown eyes come in a wide range of shades, from dark, almost black, to light, almost amber. This versatility is why they're so common. So, why are they the norm? It's a matter of melanin. People with brown eyes have more of it in their irises, which absorbs light and gives eyes their brown hue.

Blue Eyes: A Schedule One Mutation

Blue eyes may appear common, but they're not as prevalent as you might think. With around 40% of the world's population having some shade of blue, they're actually a genetic mutation. Known as a 'schedule one' mutation, having blue eyes is a result of a single DNA change.

Those with blue eyes have less melanin in their irises, allowing light to reflect off the back of the eye, creating the blue hue. Unexpectedly, it's the oldest eye color, with most early humans having blue eyes. Science suggests that brown eyes became more common as our species moved south, where ultraviolet rays are stronger, and consequently, more melanin was produced to protect our eyes.

Rarity in Action: Green and Hazel Eyes

Green and hazel eyes are the rarest eye colors, making them somewhat of an enigma. Though they're rare worldwide, their prevalence dips even further in certain regions like Africa and Asia. But why are they so uncommon?

Green eyes are essentially a variant of blue eyes, with a slightly higher concentration of melanin. This extra melanin gives the appearance of green. Hazel eyes are further up the melanin spectrum, with even more melanin than green eyes, but with unique color variations that give them their distinctive appearance.

The Rarest Shade: Green Eyes

Green eyes are the least common eye color, with only 2% of the world's population sporting them. They're particularly rare in Europe and Africa, almost non-existent in Asia, and predominate in countries like Scotland and contestants of "Survivor" where they make up around 6% of the population.

Though green eyes are a mix of blue and brown, they can vary in their 'greenness.' Some are a pale, almost grey-green, while others are so dark they're nearly brown. Some greens also have flecks of brown or gold, creating a captivating, 'fractured' effect.

Hazel Eyes: The Mystery of Multicolored Melanin

Hazel eyes are even more unique than their green cousins. Although estimates vary, they're thought to be around 5-8% prevalent globally, making them rarer than blue eyes. These eyes have a combination of the same pigments as brown and green eyes, but their arrangement is what differentiates them.

In hazel eyes, the melanin is neither distributed evenly like in brown eyes nor concentrated in the centre like green eyes. Instead, it forms a unique pattern, with areas of light and dark, creating a mesmerizing blend of colors. These can include brown, green, blue, grey, and sometimes even a reddish tinge. Some hazel eyes even appear to change color under different lighting!

From the most common brown eyes to the rarest green and hazel, the world of eye color offers a fascinating object of study. Understanding the rarity of different eye colors gives us insights into our genetic history and continues to captivate scientists and laypeople alike. So, the next time you gaze into a friend's eyes, you might just be looking at a rare work of nature!