Lovely print. I had a peacock feather print and I had a colour called glacier Grey behind. Think it was Wattyl . Again like your other walls it is a greenish grey but darker. I also had my prints on a charcoal wall..loved that too. As you said the picture ties in with the chairs and now it's not necessary to add more matching colours. I'd buy a couple of sample pots and paint large pieces of cardboard. With the other walls I would consider painting them in whisper white (Dulux) a very universal colour that ties in nicely with all colours.

Before replacing your curtains as this can be quite expensive for such a large window, if they are in good condition, add a band of extra fabric to the bottom in what ever suits you, your existing curtain track can then be moved up to the ceiling for good looking full length curtains without the large round eyelets, could save you a lot of money, I would look at replacing/removing the sheers cheers

Problem with chase lounge is that it is all at same level. It is much more comfortable to have ottoman slightly lower than seat. There are other pros and cons to each

Assuming the art picture was taken on your wall , the wall looks to have a grey tinge . The art i would describe as blue and grey , with a hint of mustard . The couch is grey . The red rug is dated ( or maybe isn't , but you understand ) and isn't a feature , but its pleasant . The grey with white specks is just 'nothing' , a large doormat . Personally , I wouldn't even consider a grey rug . Anywhere . But definitely not in a grey room with grey furniture . There is nothing wrong with the charcoal joinery , but IMO there is nothing that excites or stands out , and that includes a tan or charcoal leather chair . When a pleasant red rug is the thing that stands out , you'd maybe reconsider your colour scheme ? And CP , I prefer white leather furniture if you have a burnt orange feature wall -- the black joinery would be great , the grey couch would need red or burnt orange cushions , although the red rug may work .