Wow, how didn't I know this? Regardless, they are sterile so they aren't an explanation for blue eggs. I guess I shouldn't be surprised, they are much closer than guineas which can still occasionally breed with chickens. (How that is even possible since guineas and chickens are not from the same...
Interesting. (The thing about pheasants being bred with gamecocks (unless they are talking about junglefowl which I am pretty sure all have white eggs) is a lot of malarkey though.)
Along with egg color being linked to feather color.
But it is good to know that some strains do lay blue eggs.