Central heterochromia is a ring of one color around the pupil, inside an iris of another color, such as a golden ring inside green or blue. It usually shows in both eyes, and it is the most common kind of heterochromia. Our free eye color checker reads the inner and outer zones of your iris separately and tells you when they differ.
What central heterochromia looks like
The iris has a natural boundary about halfway between the pupil and the edge, a wavy ridge called the collarette. In central heterochromia the part inside that ridge is one color and the part outside is another.
The most common patterns are these.
- Gold or amber inside green. Often described as sunflower or starburst eyes.
- Brown inside green or olive. Very common in hazel eyes.
- Gold or brown inside blue or gray. Striking because the colors are so different.
The ring can be thin or cover nearly half of the iris. It can be a smooth band or spiky, with rays of color reaching out into the outer zone.
Central heterochromia vs hazel eyes
This is the most common question about central heterochromia, and the honest answer is that the two overlap.
- Hazel is a color name. It describes eyes that mix brown, gold and green, usually brown near the pupil and green further out.
- Central heterochromia is a pattern name. It describes any iris with a clearly different inner ring.
So a hazel eye with a clear brown ring around the pupil and a green outer zone fits both descriptions. Where people draw the line usually comes down to how sharp the border is. Eyes with a crisp ring and a clearly different outer color are more often called central heterochromia. Eyes where the colors blend gradually are more often called hazel. Our guide to the eye color chart shows where hazel sits among the other colors.
How common is central heterochromia
There is no reliable count. Central heterochromia is the most common of the three kinds of heterochromia, and many people have it without knowing the term. Claims online that under 1 percent of people have it are not backed by any survey we could find. If your green, hazel or blue eyes have a golden ring at the center, you share that pattern with a lot of people.
Our guide to heterochromia covers all three kinds, including the rarer complete and sectoral types.
Why the inner ring is a different color
Eye color depends on how much melanin, the brown pigment, sits in the front layer of the iris. In central heterochromia, there is more melanin near the pupil than toward the edge. The inner zone, with more pigment, looks brown or gold. The outer zone, with less, looks green, blue or gray, because more of its color comes from scattered light.
That uneven spread is usually present from early childhood and stays stable. Central heterochromia present since childhood is harmless and does not affect sight. A new change in eye color in an adult is worth showing to an eye doctor.
How to see your own ring
The ring is easy to miss, because pupil size and light change how much of it shows.
- Use daylight. Face a window, with no lamps on. Warm lamps blend the inner and outer colors together.
- Make your pupil small. Bright light shrinks the pupil and uncovers more of the inner ring.
- Get close. Use a mirror or the front camera with zoom, held about a forearm away.
- Turn off the flash. Flash adds a bright reflection that hides the ring.
Our eye color checker does this reading for you. It splits each iris into an inner zone and an outer zone, measures the color of each, and adds a note to your result when the two are clearly different. You also see a zoomed crop of each iris with the ring that was read drawn on it.
Central heterochromia and limbal rings
Many eyes with central heterochromia also have a dark outer ring at the edge of the iris, called a limbal ring. Together they give a target look, a gold center, a colored middle and a dark edge. Our guide to the limbal ring explains that outer ring.
Makeup that shows off the ring
You can choose whether to bring out the inner color or the outer one.
- To bring out a gold center. Bronze, copper and warm brown shadows echo the gold.
- To bring out green. Plum, mauve and wine sit across the color wheel from green.
- To bring out blue. Peach, coral and terracotta make blue look brighter.
For colors that suit your skin and hair too, try our seasonal color analysis.
Is central heterochromia caused by inbreeding
No. This question comes up often online, but there is no evidence that central heterochromia is linked to inbreeding. It is a common pattern of pigment that shows up in people of every background, and it follows the same many gene inheritance as eye color in general. Our guide to heterochromia covers the other two kinds as well.
Names for central patterns
People use a lot of names for central heterochromia, often based on how the inner ring looks.
| Name | What it describes |
|---|---|
| Sunflower eyes | A gold or amber ring with petals of color reaching into green or blue |
| Starburst eyes | Thin rays of gold or brown spreading out from the pupil |
| Ring around the pupil | A smooth, even band of a different color |
| Hazel center | A brown or gold center inside green, the classic hazel look |
None of these names are medical terms, and they overlap. They are simply ways to describe what you see in a close photo.
What we found in our own test photos
Our eye color checker splits each iris into an inner and an outer zone and notes a central pattern only when the two are clearly different colors. On 701 public portraits with a recorded eye color, it noted a clear central pattern in 7 percent overall. It showed up most in eyes recorded as hazel and green, at 10 percent each, then blue, at 8 percent, and least in eyes recorded as brown, at 4 percent, where a darker ring has little contrast to show against.
Those numbers count only clear, sharp rings in photos that were mostly taken at events, often under warm light that blends the zones together. Softer central patterns, the kind many hazel and green eyes have, are far more common than a strict count suggests. The full test is on our methodology page.