While you can't really go wrong with a white barrel lamp shade, one in black can be right on. It'll work with a variety of styles and punctuate a room with a little moody sophistication.
Thinking outside the white lampshade box took a little time, but I've come around now that I've started accumulating images of stylish rooms dotted with black lampshades. They simultaneously look a little richer and edgy, and, since they're less expected, they can add a thoughtful touch. They'll of course work best in spots where you want softer, not bright, light, which might mean on a console or side table or by your bed.
Images: 1. and 5. Lonny 2. via Eclectic Revisited 3. Elle Decor 4. Design Files via Decorista 6. Me Oh My! 7. House & Garden via Shelteriffic 8. Domino via Rhemod 9. Design Scout via DecorPad 10. Brian Grech for Valletta Suites via Yatzer