apparently, ameraucanas can lay a 'golden' or deep yellowish egg sometimes, depending on the past breeding, which, i THINK (as i am not an expert on the whole EE/Araucana/Ameraucana thing) makes it an EE.
there are lots of people who are well versed in these breeds here...you can use the search feature to find more about those breeds.
there are olive, light violet, blue, green, and even very rarely pink and gold tinted eggs that can POSSIBLY show up with these birds.
no matter what, wouldn't it be neat to find? like the Easter bunny showed up just for the heck of it or maybe a practice run for the big Easter delivery!