should I go with a cream-colored rug with a lighter color? That would give an espresso and cream look...
Yes, it would look nice, and would not get as dirty looking as a cream color rug. And with the solid furniture it will add interest as well. I would add some bright colors in your accessories, just about any color you like will look good. I personally love lighter blues with brown, sage green and brown is a hot combo right now, or warm tones like red or orange would spice it up. Add your choice in pillows, throws, table decor, whatever you love.