Hello Patricia! The corner space of your home is beautiful! Since the chairs have a design pattern, the rug should be simple with an unexpected touch like, a pop of color or small patterns. To brighten up the space, I would suggest a lighter color such as, white or light gray. The rug can become an accent piece to ground the finishes and materials together. I hope this helps and your room turns out to be what you wanted.

maybe grey with a little red?