Down here the white eggs are usually the plain store eggs, and the brown eggs are the "organic" "cagefree" "freerange" "vegetarian" etc. So I have some people that only want brown eggs because they are better for you, and the green/blue eggs are lower in choesterol
. There is some truth to that at the brown, becaue how the chickens are fed, but at home, all my chickens eat the same food. I try to tell people, but I usually get, "I only eat brown eggs because they are better for you", so they just get brown eggs.
A lot of people also think that a blood spot means the egg is fertile