I agree with you. I think the brown contrast makes it a bit more casual so if it's not going to fit the purpose of why you ordered it..... maybe find the one you REALLY wanted to begin with.
And, btw, you are tiny (and too cute). Now I know why they make those little bitty bags. I would swallow that bag up. I'm def a large soho hobo kind of girl
haha lol - I actually have two large hobo's from the same season that I love:
This is actually my smallest bag