Well, the issue is that white eggs have become known in the states as "bad," because one only ever saw them for years - and we know that most (if not all) of those stores bought from battery (etc) farms.

You'll much more often see brown, greens, tans, etc at markets and things where one is told the chickens are much happier (whether it's really true, who knows). Color was a cheap way to tell, until the stores realized they could take advantage of that by selling brown eggs. And charge more for them.

I'm extra snobby - we get our eggs from a farm I've actually been to. I've seen the chickens and where they keep them, which is nice. They stock them at the butcher shop (across the street, literally), which is extra nice.