If you are looking to color coordinate and have a black comforter as the focal point of your bedroom, you may want to consider some strong contrasting colors like red, teal, dark blue, gold or purple. Pillowcases and shams in those colors would really make the black stand out nicely. Along with your bed set, you can also add curtains, drapes and rugs in these colors as well to add a distinguishing theme to your room.
Queen size black comforter sets:
Queen size black comforter set pictured: Chezmoi Collection 8 Pieces Luxurious Solid Black Pleats Stripe Comforter Set Bed-in-a-bag for Queen Size Bedding
Of course, you can also take the opposite approach, and go for a monochrome look.