What an absolutely adorable chick! I can see why she is the family favorite! (Great pictures!) Looks like she is a black? She should lay you lots of blue eggs!
So you are predicting black? Oh no, my OCD will not like that!! Lol! I ordered the chicks I did for a wide variety of egg colors and a wide variety of plumage. Looks like instead of having a black hen, a blue hen and a blue laced red hen, I'll have 3 black hens...BORING! Just kidding. ...a little. At least I still should get a variety of eggs.
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Isn't that always the way it goes! You should have a wide variety of egg colors! She does look like a black from those pictures to me... sometimes the blues are pretty dark, but they usually look grayish to some extent rather than "black". You might try posting in the What Breed/Gender forum https://www.backyardchickens.com/f/15/what-breed-or-gender-is-this for input about her color, there is a BBS Ameraucana thread but it isn't very active.