What Are Blue and Brown Eggs? Nutritional Differences and Origins

When it comes to eggs, many wonder whether color says something about quality—specifically, why some are blue and others brown. Beyond aesthetic appeal, these egg varieties differ in pigmentation, farming practices, and even nutrient profiles.

Blue and brown eggs refer primarily to their shell color, determined by the breed of the hen rather than shell quality. Blue eggs come from hens like the Araucana or Easter Egger, whose genes produce a natural blue or green tint due to a protein called protoporphyrin. Brown eggs, laid by breeds such as Rhode Island Red or Plymouth Rock, result from a different pigmentation process. The color itself has no impact on taste, nutrition, or freshness.

The shell color is purely genetic and unrelated to the hen’s diet or living conditions. While some believe brown eggs are healthier, studies show no nutritional difference between blue, brown, or white eggs. The shell’s pigment acts as a natural shield against UV rays and bacterial penetration, offering similar protection regardless of hue.

Both blue and brown eggs offer nearly identical nutrition—high-quality protein, essential amino acids, vitamins D and B12, and choline. The choice often comes down to preference, cost, and personal connection to heritage breeds. Brown eggs may appear slightly cheaper due to common farming practices, but premium prices on blue eggs reflect novelty and breed standards rather than quality.

Understanding what are blue and brown eggs clarifies that color is a visual trait, not a quality indicator. Whether blue, brown, or white, eggs remain a nutrient-dense staple. Make your choice based on taste and ethics—because at the end of the day, every egg, regardless of shell, delivers freshness and nourishment.

Our brown and blue Heritage Eggs come from two distinct (and distinctly beautiful!) breeds of birds; the Speckled Legbar Hens, who lay the various shades of blue eggs, and the Copper Maran Hens, who lay the brown. In short, the breed and health of the hen dictates what color eggshells she produces. In fact, all eggs start out white and, as they move through the hen's oviduct, pigments are.

There are many different eggshell colors from brown to blue. See what the different eggshell colors mean and the different ways you can use eggshells! Coming across a blue egg may catch you by surprise.

Here's what to know about them, why they're blue, and if they're any different from brown and white eggs. What are blue eggs? Blue eggs are chicken eggs that have a light shade of blue on the shell. If you've been around a chicken farm, or have backyard chickens, or open up those fancy egg cartons at the store, you may have seen blue eggs, brown eggs, and even green eggs.

Why so many different colors? Blue Eggs There are three breeds that lay blue eggs: Ameraucanas, Araucanas and Cream Legbars. The blue color is created by oocyanin, which is applied early in the laying process.

The blue pigment goes right through the shell, unlike the brown pigment. So blue eggs are blue inside and out. Green Eggs Green egg-layers, such as Easter Eggers and Olive Eggers, are created by cross breeding a blue.

The hen produces a brown pigment that blends into the blue shell of the egg, resulting in a greenish-hued egg. The darker the brown pigment, the more olive-colored the egg appears. Other chickens that lay colorful eggs include the Barred Rock, Welsummer and Maran, with the color of the egg depending on the breed and its genetics.

The Basics of Egg Coloration When it comes to egg color, you might wonder why some eggs are brown, blue, green, or even pink. Let's start by exploring the basics of egg coloration and what factors affect a chicken's eggshell hue. Factors Influencing Eggshell Pigmentation Genetics play a significant role in determining eggshell pigmentation, with different breeds exhibiting distinct color.

The color of an eggshell is determined by the breed of the hen, and genetics decide whether it will be white or brown. Learn about the unique characteristics, breeds, nutrition, and health benefits of blue eggs with brown spots, plus fun facts and recipes to try at home. Green eggs often come from hybrid chickens like Easter Eggers or Olive Eggers, which are crosses between blue egg-laying and brown egg-laying breeds.

Does Color Impact Taste or Nutrition? A common misconception is that the color of an eggshell indicates differences in taste or nutritional value.