Well all the hens before her were green egg layers. The father would have been a white egg line.That's neat. I've actually seen hens lay eggs before but never have videoed it.
I think the reason she lays a blue egg though is beause her mother (if she was a blue egg layer) mated with a leghorn rooster which came from a white egg.
That's as far as I know.. I'm pretty sure that's the only colour he was collecting from them.. Could be wrong. I know the ones I got from him before he bred them to the leghorn only laid green eggs.