I kept araucanas, they lay blue-green eggs. I had a lavender araucana, she was so pretty. Her eggs were the bluest. A little white silkie for white eggs, a maran for dark brown and hybrids (goldliners) for maximum egg production.
There are a few hybrids, I have had others, on the whole they are bred from chicken varieties that lay best all year round, and eggs of a decent size. They get worn out, so don't live as long. I don't have any chickens at the moment because DBH and I are having a disagreement. I want pretty, pet 'designer' (as he calls them) chickens that have a long and happy life and don't lay as often, he wants loads of eggs from short-lived chickens that are far cheaper to buy and you get paid back in eggs what you spent on them.
Capitalist pig.