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!

I would try the Woodcliff Lake, it has a warmer tone than the lighter greys.

~$400 including expedited shipping. My GC just had his regular countertop guy do them, which wasn't great.... he had trouble making clean cuts. If I were going to do it again I would have pressed for someone with expertise to cut them. You can see in the image that the facing is not made of the stone peak, because too much was broken during the cutting to make the mitered edge. I'm a little bummed, but mostly pleased with the surface (which is the important part) thus far.

Thanks for that AJ Interiors. Yes we have painted chimney breast (white- same as walls) We have a bought a huge dark grey mirror (metal) which has a slightly industrial feel but also in a traditional French style shape (I'm not describing this very well!) the two combinations will hopefully work well in a tradition villa, giving it a modern look. But we really need an injection of colour to lift everything. Am looking for some copper/metallic bedside lights. Quite like this copper lamp from Citta . https://www.cittadesign.com/home/living-room/lamps-light-shades/guarida-table-lamp-wmetal-shade-IIE0005