EGG COLOR INSIDE

[ArthurLedd]

i KNOW THIS HAS BEEN COVERED BEFORE but why are my green eggs color blue on the inside and my browns white

 

[azygous]

Simple answer is that the blue eggs start out with a blue shell in the shell gland, and the brown eggs start out white, then a tint is deposited on the white egg by the hen's body using spent red blood cells. https://www.abc.net.au/news/2018-02-19/chemistry-of-eggshell-colour/9455660

 

[casportpony]

Simple answer is that the blue eggs start out with a blue shell in the shell gland, and the brown eggs start out white, then a tint is deposited on the white egg by the hen's body using spent red blood cells. https://www.abc.net.au/news/2018-02-19/chemistry-of-eggshell-colour/9455660

 

[analyticalblonde]

"Eggshells start out white; that's the natural color of the substance that makes up eggshells...The blue color is produced by biliverdin, and the brown color is produced by protoporphyrin. These "dyes" are incorporated into the shell in varying ways based on their different compositions...

When eggs are brown, the color is sort of "painted" onto the white egg inside the chicken's reproductive tract by the shell gland pouch. (When you crack brown eggs, they are brown on the outside and white beneath.) The darker layers just produce more of the brown color to go onto the shell...However, the brown "paint" all goes on the same way...

The mechanism for creating blue and green shells is a little different. For blue eggs, the blue color actually goes all the way through the shell, even to the inside of it. (In other words, when you crack blue eggs, they'll be blue on the inside, too.) Again, the brown color can be thought of as being painted on the outside, while the blue color is distributed throughout the shell.

Green eggs are laid by chickens that have both blue and brown egg-laying genes. The blue ends up throughout the shell as described above, and the brown is painted on top, creating a green appearance. (When you crack these shells, they'll be green on the outside and blue on the inside.)

Because green eggs have both pigments types, they can be exceptionally hard to candle; candling is harder sometimes with green eggs, even light green eggs than it is with deep chocolate-brown eggs." Lucas & Torres, My Pet Chicken Handbook, 2013

 

[aart]

There are only white and blue shells.
Brown eggs have brown coating on white shells.
Green eggs have brown coating on blue shells.
The brown coating can be very light or very dark.

 

[ArthurLedd]

THANKS TO ALL I NOW GET IT