It is hard to tell how "olive" colored that egg is when not seen in person. You would be able to tell. I have olive eggers just starting to lay as well. Mine are Amerucana/Welsummer mix. I bought eggs and hatched them in my incubator. Here are my olive eggs mixed with other eggs, and one of my olive eggers named Barbara Ann. Mine have muffs and beard, I can't tell if your girl does, but it looks like it! Ain't we lucky! We have pretty girls!