Around here, most breeders seem to be after a more even color but I can't find anything in the standards. Do you have a link to something I can reference?
There seem to be some differing opinions on Ameraucana egg color. Some do not consider green egg layers to be true descendants of the rumpless Chilean Araucana. But indeed, egg color is not considered in the U.S. for show birds.
http://www.heritagepoultry.org/learn/ameraucana.htm
"Barn Lime" is a farmers term for agricultural lime, aglime or A G lime, which is crushed limestone. Limestone (calcium carbonate) is not the same as hydrated lime. The "pelleted" formulas have less dust. Many people swear by it for keeping down ammonia, smell, flies, fleas etc. in coops. Some...
We do ours with oatmeal and some chick feed. Originally we followed instructions that say they need moisture from fruits or veggies but even a somewhat dry piece of carrot almost always started mold in the oats and the mold is your enemy. Perhaps for us it is the Florida humidity. If you get it...