pink egg laying EE?

[Sonoran Silkies]

Anyone have silkie/Ameracuana crosses or silkie/EE?

I have a silkieXaraucana (true araucana) who lays an egg the clear pastel green of plastic easter eggs (the pastel verion, not the bright emerald/grass green). Very pretty--I just brought one inside--almost wouldn't know the green shade is caused by a layer of brown tint over a blue egg. But my araucana lays a blue, blue egg; brought one of those in earlier.​

 

[Sonoran Silkies]

I absolutely agree that human hair and eye colour genetics aren't a match for egg colour genes. Except maybe that all are determined by multiple genes, and I don't believe that any have been completely sequenced.

There are two entirely different things going on with the blue eggs and brown eggs. Blue is the colour of the eggshell--the colour literally goes entirely through the shell. The shell is blue.

Brown is formed on eggs in a different manner. AFTER the eggshell is formed, a brown coating is applied to the already formed shell.

There is one gene that determines if an egg has a blue eggshell: O If the hen is OO or Oo, the eggshell will be blue. If the hen is oo, the eggshell will be white.

There are 12 or more genes that affect the brown coating--some lighten the colour, others darken it. I am not as well versed in these--perhaps if I bred marans or welsumers I would try to learn more.

A blue egg with a brown coating is some shade of green.

All chickens have all genes--you can't not have a gene and be part of the species. What differs is which alleles you have for each gene. In my example above for the blue egg gene, the alleles are O (blue-egg) and o (not blue egg). In some cases there are two alleles for a gene; for other genes there are a number of alleles. You can think of alleles as the set of alternatives for a particular gene.