They're all brown
Actually, that's not true. They range in color from very light tan to brown, but white eggs are simply the product of a white feathered chicken, there is no difference.
Yes I know that... and also there are chickens that lay blue eggs.
http://www.wideopenpets.com/4-chickens-that-lay-blue-eggs/ (Had a frend whose son raised these)
But no matter... the nutrition is the same but the yolks of brown one taste a bit stronger.
I have a problem with the yolks of chickens.. not the whites and I can tell by taste. So I avoid.