Three black and white prints above the bed might be modern in black frames to match lampshades. Place the white pillows at the back and grey to the front then add some new cushions. So many accent colors will suit, burnt orange, red, rusty pink, just depends on what you lean towards. Use one of those vibrant colors for the curtains and in added artwork on another wall.

I like the idea of bringing in some blue, that is deeper than your wall color - in both the art for above the bed, and some accent pillows - I have attached some images

The beauty of neutral colors on the bed is that you can change out other items seasonally if you wish. Use colorful accent pillows and pull the same color in the pillows to an accessory on the nightstands and a picture on the wall. The grays tend to work well with limey greens, or play up your accent wall by adding a bold teal color to the bed. Something unexpected above the bed, like round forms or a ledge with pictures, will give the space some personality.

A throw blanket is an easy way to add a splash of color, and there are so many options...

These are are ideas from our designer selection of mohair throws.
http://mohairsandmore.com/mohair-throws-in-40-designer-hues/