What color curtains go with brown/black furniture?

I have a brown couch, dark brown chocolate like bookshelves, black television stand and a black tv stand along with a black hdtv. I have hardwood floors they are maple colored....i have 2 artificial trees in my home....some burgundy but i will be removing it and trying to replace it with a different color that goes good with brown/black. My theme in my home is safari, so i am wondering what color of curtains will go good with it? I don't want white, blue or yellow or red/burgundy i want something different but nice at the same time....I currently have brown...and i find it's too much brown!! i need to do some serious color changing.