Chicken eggs are available in a wide variety of colors, from the standard white and brown to even some being blue, green, and even pink. Typically most people have only seen the brown and the white varieties unless they themselves are flock keepers.
For the most part, brown eggs are usually more costly, but it is essential to remember that the color of the eggshell does not indicate the quality of the contents inside. In fact, the only distinction between a brown and a white egg is that of what breed of chicken laid them.
Image: PureWow
When I was growing up, being a city-raised girl, I always heard that a white chicken would lay a white egg, and a brown chicken would lay a brown egg. Although the coloring of the chicken will often indicate the color of its eggs, it is best that you not consider the feathers exclusively.
The color of their earlobes predicates the best indicator of what color eggs a hen will be likely to lay. You heard that right—their earlobes! If the earlobe, that flap of skin just below where the hen’s ear would be, is white, she will lay white eggs.
However, if that flap of skin is a darker color, chances are they will lay brown eggs. It is important to note that this is not written in stone, and is more a rule of thumb. Keep in mind that as with anything in life, there will be exceptions.
Image: Wikipedia
The poultry industry chooses most often to use White Leghorns for their layers, as they are an excellent egg-laying breed with a much cheaper diet to provide. Those breeds that lay the brown eggs, such as Rhode Island Reds, require a more expensive diet and, as a result, are usually a favored choice for backyard flock keepers.