I have a theory that you can make pretty much any two colours go together, if you repeat the theme in a relatively conservative way (i.e. not entire walls in the shade/s), and mix them with neutrals.
I have to ask ... why is your living room black with several shades of brown? Are you renting?
Black and brown aren't a great combo to begin with, but there's definitely ways to brighten it up.
Do you have anything on your walls? Art? Prints? Can you pick a colour out of those, and go for a couple of shades of that?
If not, you can create 'art' really cheaply by choosing a print you like, or a slab of wallpaper with an interesting pattern, and getting it board-mounted rather than framed. The bigger, the better. Or two quirky, matching-ish postcards, and then get them put into much bigger frames with mounts. And then pick out a colour or two from that.
Cushions, curtains, a rug (a couple of rugs!), objéts (vases, ornaments, (and not like your granny used to have), etc).