Try a mid-century modern rug like Hemphill's Rex Ray Area Rug Collection or Jaipur Traverse Caracas. I looked up 'mid-century modern rug' and chanced upon these on Houzz. I like the muted colours which would soften the cream on brown. The mid-century motifs would highlight the mid-century chair. Good luck!

I have a similar family room, with big windows and a sliding door and we have block out Roman blinds on them. They sit at the top of the windows most of the time as we don't have any privacy issues with being looked in at by the neighbours. We really only put them down at night in the winter. Ours have a creamy coloured background with taupy wavy lines on them. Very neutral. I never could have imagined that's what I wanted til I saw the fabric. Good luck I'll see if I can find a photo to post.

Hi Sue, I think the wall colour (white looks like an white/off white) is lovely. It’s neutral and light, and will be the best back drop for any soft furnishings. I would suggest maybe updating some of your furniture. Your sofas look in good condition, so re-upholstering to change the colour may be a expensive option. in a bid to save some money, perhaps updating your rug to a lighter/more neutral pattern/colour (look at armadillo rugs) is a better option. Also updating your dining setting (perhaps something with chair upholstery to compliment the sofa, and even a large light coloured marble top) to be more contemporary and in keeping with your lounge suite would be the way to go. My clients often find it difficult to part with certain pieces that hold sentimental value, but often a new home requires a furniture update. In summary, I’m not convinced changing wall colour will be able to link all your furniture together. Stick with one piece that works well (ie. the sofa) and work towards updating the rest. Good luck!

Suggestions from neutral colours: https://www.dulux.com.au/colour/colour-trends/2018/essential Ceiling & walls the same colour is a good choice for square set. There will be subtle hue difference in various lighting situations anyway, which provides depth and makes for an interesting look.