Darker shades of other colours work quite nicely however. It darkens the room a bit - without the feeling of shrinking it - or the absence of sight. So go with something that wouldn't contrast too much with your floor and curtains (not dark grey either - it brings a wet cement feel to the room and looks horrid) By darker shade I don't mean navy blue to a light blue - more of a saturated shade inbetween. It's kind of amazing how dark a colour can look that isn't actually dark - or how light a dark colour can look x=