I think you have too much mono chromatic, non-patterned color going on. I would add an oriental rug, and pop in geometric prints that are complementary in the throw pillows.

A red oriental rug, with red curtains and red throw pillows would be really fabulous.

My gut is telling me to go light to medium in overall tone. Your rug looks dark. Always go with your gut. Perhaps you should look in a store to see the colors in person. Pay for switches to take home, I know RH does this. A real carpet store will bring things out on approval, no charge. This is the easiest way to look, they will take what you don't want and leave you with the perfect rug. I hope you can find what you want, I really do!

Pillows

More pics of the pillows