Blue can be clean, too...
Sudan 2012 317 Habili Moussa Eritraean border.jpg 30.22KB 13 downloads
The exposure is a bit harder as you need a longer shutter speed and a wider aperture, but it makes a change from black.
Alternatively, you can use a wider aperture to throw the background out of focus:
tim15.jpg 48.54KB 15 downloads