You need art on the wall and a rug and color! Your first step is to purchase an inspiration piece. That piece will either be a rug or a large piece of wall art. That sets the color palette for pillows chairs windows and walls. Wall color is last. Find out if you can have electricals inside the wall. I am guessing you are not in US and house is solid brick or this is a basement space as it looks quite industrial.

I think I am certainly quite late to reply on this post but nevertheless will put my suggestions here. Go for 2 loveseats in a light/neutral colour against the 7 ft and 15 ft wall. Opposite the 15 ft wall you could put a nice upholstered bench in contrast/printed fabric. Also for a warm glow put a nice standing lamp in the corner between both sofas. You can place a nice mirror on the TV wall and put a nice shelf beneath it and place a lamp there with few knick knacks if the door opens outside in the balcony or is sliding. Also, keep two upholstered ottomans below the mirror which can be pulled for extra seating when required. Place a low height coffee table small one like a 2x2 ft.

I am an amateur lover of home decorating. I too have a very awkward long narrow living room that is 350cm by 620cm. Additionally it has diagonal traffic flow from the front entry to the rest of the flat. The owners have built a cabinet at one end for the TV, etc. I think I would make a cosy seating area at one end of your long living room. Place a grey or brown sofa at one end but not against the wall. I like the idea of a narrow console table behind the sofa with a table lamp, a plant or a large statue. This brings the end wall closer in. A peachy or raspberry carpet in front of the sofa will pick up the wall colour and anchor this seating area. (grey and some browns also coordinate with raspberry/peach). A couple of raspberry sofa cushions can help include the wall colour into your overall scheme. Single chairs opposite the sofa allows visual and actual flow down the narrow room and completes this seating area. At the other end of the long narrow living room I would place a reading chair, a floor lamp and a small round coffee table. If there is room you could have a tall bookshelf with you favourite books. What do you have on the long side walls? I have windows and doorways on both long sides. I decided to use pull up shades on the windows instead of curtains which I thought would make my narrow living room look more narrow. The wall colour is white but I think I will tone it down to a soft grey. I plan to paint the end walls a darker grey.

Hello Soumya, If the make is similar the changed colors may not look as great. The best bet would be to wait for a couple of days as this is festive period most of the goods would be out of stock. But they would be addding to the stocks soon. Add it to wish list , if the website allows you to... Another option would be to go with accent chairs as you mentioned already. The make and finish being different wouldn't matter as much. And the last option is to get it customised same as existing one with a local vendor. Costly but more durable. Thanks, Nitin Cornerstone Designs Bangalore.