Decorating a bedroom  

I would bring in another color, something a little brighter, like maybe a nice shade of red. You could get curtains with some red in them and then add other small accessories to bring the red into the rest of the room. Like maybe a red candle, a red throw pillow, maybe even a vase with some red flowers, real or fake. You could really do that with any color, just make sure it is a color that looks good with the colors you already have. Of course if you wanted to go with white, you could get the accessories in white as well. I just happen to like more color.

How about a contrasting color curtain? Not black or white, but red, yellow or something like that and a print.. not necessarily floral, but geometric or even lacy - black lace... has a conotation there!