There are tons of papers available that would go with your midcentury home. Many people tire of a paper quicker than they are ready to redecorate and they can also look dated in a couple of years. Metallic papers were big im midcentury...perhaps a metallic silver paper? Are you also considering paint? You can get it in so many textures and a blue wall to match the blue in your loveseat would be lovely with some midcentury art and sculpture, or photographs on it. A mirrored wall with or without art or sculpture would also work with midcentury. These treatments are easier to adapt should you wish to change the look slightly from time to time. I would suggest replacing your stairrail with chrome or acrylic if that is in the budget...see how well the loveseat frame looks with the fabric? I hope you will post the "after" photos for us to see. Above all, enjoy the process!

Thank you for your help, I had never questioned my taste until a recent visitor commented on my lack of color! I like the look of the mongolian lambs wool cushions-have not seen here in New Zealand, I will have to search. Thanks for the reminder about mirror, it mostly does reflect the dresser but yes the doors are focal too, I hadn't noticed. I used to have more height on the living area coffee table but when I removed the Television and hung the vintage ceiling tiles (photo attached) on the wall the height interrupted them from another angle (not photographed). Our house is located semi rural with bush and water views, with this being quite focal in the lounge (with the wall paper) which is why I have not hung art. With this (as photographed below) would you still hang something? Really appreciate you all taking the time to answer. Thanks.

I would make a wine bottle holder - not sure of the size of pictured objects but the blue one with with hole could be the base of it. I would do a web search for wine bottle holders and look at the images, lots of crazy/cool stuff out there. Or a hamster agility course (again depends on size) :) there are some really funny hamster/mouse agility videos out there.

The blue is awesome (grey is too trendy)! The reason it stands out to you is perhaps because it's the only real colour there. Bring in the blue in a window treatment, a small appliance that sits on the counter, a pretty tray or area rug. Also, it is more appealing often if there are more than 2 colours - so right now you have a white and blue colour scheme - bring in red or orange or fushia - something from the other side of the spectrum (like you did with the yellow flowers but in a more permanent way)!