How do I tell green eyes from brown eyes?

Look at the iris under natural daylight. Green eyes lean toward soft green with a warm / lipochrome undertone, while brown eyes are deep brown with a slight warm / amber undertone. The free Eye Color Identifier removes the guesswork — it samples the actual pixels of your iris and assigns the closest color family.

Which is rarer, green or brown eyes?

Green eyes occur in about 2% of the world population. Brown eyes occur in about 79%. Green eyes are rarer.

Are green and brown eyes genetically related?

Both color families are determined primarily by melanin levels in the iris controlled by overlapping genes (OCA2, HERC2, others). green eyes (polygenic) and brown eyes (dominant) sit at different points on the same melanin spectrum.

Can green eyes look like brown eyes in some lighting?

Yes. Lighting, surrounding colors, and camera white balance can shift the apparent color. The Eye Color Identifier's AI analyzes the iris pixels directly so the call doesn't depend on lighting context.

Eye color comparison

Green vs Brown Eyes

How to tell green eyes apart from brown eyes — rarity, genetics, undertones, and the AI test that ends the debate.

Green Eyes

2% of the world · Polygenic

The rarest natural eye color — a striking blend of low melanin and lipochrome.

Brown Eyes

79% of the world · Dominant

The world's most common eye color, rich in protective melanin.

How green eyes differ from brown eyes

Trait	Green Eyes	Brown Eyes
Primary tone	Soft Green	Deep Brown
Undertone	Warm / Lipochrome	Slight Warm / Amber
Contrast	Medium-High	High
Lighting effect	Glow with golden flecks	Soft reflections enhance clarity
Rarity	2% globally	79% globally
Genetics	Polygenic (Multiple genes)	Dominant (OCA2)
Sun sensitivity	High	Low

Which one do you have?

Mirror checks under bedroom light don't resolve green vs brown reliably. The Eye Color Identifier looks at the actual iris pixels in your photo and returns the closest color family with a confidence score and a multi-tone breakdown — useful precisely for border cases like this comparison.

Identify My Eye Color

Frequently asked questions

How do I tell green eyes from brown eyes?: Look at the iris under natural daylight. Green eyes lean toward soft green with a warm / lipochrome undertone, while brown eyes are deep brown with a slight warm / amber undertone. The free Eye Color Identifier removes the guesswork — it samples the actual pixels of your iris and assigns the closest color family.
Which is rarer, green or brown eyes?: Green eyes occur in about 2% of the world population. Brown eyes occur in about 79%. Green eyes are rarer.
Are green and brown eyes genetically related?: Both color families are determined primarily by melanin levels in the iris controlled by overlapping genes (OCA2, HERC2, others). green eyes (polygenic) and brown eyes (dominant) sit at different points on the same melanin spectrum.
Can green eyes look like brown eyes in some lighting?: Yes. Lighting, surrounding colors, and camera white balance can shift the apparent color. The Eye Color Identifier's AI analyzes the iris pixels directly so the call doesn't depend on lighting context.