Like your space and choice of green. Like the green in the kitchen you referred us to. Looks a little darker or less yellow than one you did with Photoshop? You have the same issue as many of us, for one reason or another we end up trying to blend two disparate styles. The couches say man's room, formal, brown wood to me. Your room, kitchen and fireplace say much lighter in colors , style and spirit! If you try to blend the two you will end up with neither. Your purchases to go with the couches will just add to things pushing you in a direction you don't appear to want to go! I'd suggest you find some sofa covers, or even bed coverlets if you can't get covers to put over the couches. I like the colors in the fireplace. Please tell us more about what styles you like.

I am planning to add scatter cushions and think if I do a pair of larger ones for each end so they go over the arms to creat height at each end, and a couple of smaller ones, I want to bring some colour in too. I do like the idea of a larger side light at either end to, Switching the sofas is going to be my final fix if all else fails!!

The chairs are a good match. Leather is probably best, great for kids' spills and accidents, but any fabric will do. Not sure on purple with green - those two colours together clash a bit for me. The green kitchen looks great, and I'm a fan of dark wood. The only thing throwing it off at the moment is the yellowish coloured walls. If they were repainted a soft white, this would make the green and the dark wood really pop, giving you a fresh and sophisticated, calm look which I think would work well. You could then upholster in a green to match the kitchen which would look appealing. Finish it off by some fresh white flowers as accents in the room to draw the eye and you've got a beautifully transformed space with a fabulous feature dining area :)

As you probably know your current colour pallet is very restricted to the couch, curtain, arm chair, carpet and TV & TV cabinet. I would select a variety of colours from this pallet but use the tones that bring room into the living space e.g. I would find a huge, long pile rug that takes up the entire space between the couch and the TV, then add matching cushions to the couch and a throw for the arm chair. This colour of white (or cream - it is hard to tell in the picture) should really brighten up the room. The couch cushions and throw could also take on the black from the TV but my base colour would be the cream / white - what ever colour the curtains are. I would also add art work and a standing lamp. Maybe black and white art and a few nick nacks on the TV stand.