I don't really think she's an Easter Egger, just threw it in while thinking of egg color options. (Because there is no standard appearance for Easter Eggers, any chicken "could" be one.) :)
If she's laying, what color eggs does she lay?
Leghorns should lay white eggs.
Welsummers should lay brown eggs.
(And if she lays blue or green eggs, then she is an Easter Egger.)