Is that brown I see on the decorative pillows and on the sheets? Could you maybe put a light beige or taupe on the walls? I am including a link from rate my space w/ similar bedding. I love the bedding by the way!

Here is a link that might be useful: gray and yellow bedroom

graphite is a neutral and will go with almost any color

Your steel blue is almost a neutral too. However on the color wheel the complimentary color of blue is orange Now this does not mean you should go for bright orange. It just gives you a jumping off point for looking at color chips. You could go for a soft peach or an orangy red or even a gold. Or you could keep everything in the neutral and jazz it up with bright colored accessories

Gin-I really like that space you linked, looked at a lot of her pix. It looks brown in the photo above but it is really more blackish, that is why I felt it might turn out cold. I had thought about blue/gray for walls.
Oilpainter, that is funny, I was just thinking this AM how it is kinda wierd how much I am starting to like orange. It would have to be accents though-I think I would go more neutral with walls.
My trim is wood and I also have a wood beam on ceiling, my home is more rustic than modern but darn it I keep being drawn to modern lines.