When I was in Virginia, my sewing room was in the basement. I had White ceiling, white and blue speckled floor and lots of lights!! Mine is now on the second floor of my current home and although it is much more roomier - not as bright!!
Oh - you might want to think about a dehumidifier if your basement is at all damp. We actually ran one right outside my sewingroom door - really helped keep the mustiness out of the fabric.