Egg shell color

[Hinotori]

I thought the actual egg shell came in either white or the blue/green shades and brown was a overlay color on the outside. Cracking open some eggs to cook last night I noticed that the one pinkish tan egg I get looked odd to me. It looks the same color on the inside under the membrane as it does on the outside. I didn't think this was possible. So I'm thinking fluke so I dig through for the other three eggs I have from that bird and crack them open to check the inside color and they are the same. What the heck is going on with that?

 

[LarryPQ]

There ARE other factors going on with the white/blue calcuim. The shell can be tinted all the way through, but usually it is slight.

The blue/white explination is the simplest for folks to understand. Genetics still hurt my brain pan. If you want a REALLY great explination, PM Sonoran Silkies. Her genetic knowlege will make your brain go squish.