Could be, that's an interesting way to look at it.
What am I then though? Still brown? I'm someone who looks "black" with Northwestern European and African ancestry, who grew up in a black and white family.
Yes, but you are treated as black by those around you (strangers around you, anyway), and this is an experience you share with millions upon millions of other people around the world who live in white-majority societies and happen to be of African descent (and look more-or-less black).
That's just one way of seeing it, of course.