The blue is already your accent color. I think it might be more exciting than the current wall color. That table you want has a bit of Asian flair. The mirror looks to be more shabby chic. The dining set appears to be contemporary and your sconces have a Spanish feeling to me. The art is a little impressionistic and the light mostly builders' classic. Very eclectic overall. Is that what you're going for? Use a rug 4' larger than the table top all around. Lower things hung on the wall to be either 5" above the wainscot, or centered 5' above the floor. If you keep the chandelier, I would frame the art in a similar brushed metal. To add pattern, go for it in the drapery fabric.