Help Me Choose My Hair Color!?

I know this might seem like a dumb question but I wondering if someone can help me out anyway. I am an african american girl with my natural hair color , my hair color is dark brown but from afar it can look like black. I am ordering hair extensions off of the internet and I can't decide between 2 colors : off-black and bark brown. I know you can't tell my hair color unless you see but if someone can still give me some insight in which color to choose. Thanks:)