Without seeing it nor the colour on your walls (which also plays a part), I would say you could take any one of the colours from your carpet as your colour for the upholstery. Yes you can choose two complementary colours for your upholstery but make sure they work tonally. (To do this take a picture of the colours and render them black and white; the colours for your upholstery - even if they are different - should have the same level of grey in the b&w photo).

In that space you will only really have room for some seating and a DR table and chairs I would be looking fo a long low shallow unit for the media pieces and hang the T.V. on the wall 10.5 ' is very narrow. The room in these pics is almost exactly the same size as yours , if you see where the empty fireplace is that is where I would put your T.V. and then wap the bench for the sofa .

I personally would like to see you start your art collection. It may take a while but you will get there. And the hunt is tons of fun. Do not worry, about who made it, only that it is original or a signed numbered print of maybe 200 and that you love it. sources, etsy and Saatchiart. oodles and it changes all the time. often $100 or less. both under $60 etsy a few of the myriad ways to make your own Butterflies or some other small collectible natural or otherwise One large on subject matter, then small ones regarding that topic framed important things in your life magazines, album covers important newsprint that means something to you Bandanas, or how about the decorations off your favorite clothes before they go out. plates, or mugs, judgin by your couch, these are not it, but there are some really cool modern ones too large copies of musical scores. hope it helps

Beautiful space! I think a hand knotted Modern Ziegler would look wonderful in this space!