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!

The photo below is my suggestion for colour of floor. Furniture should be darker - similar to below. For the rug - choose one colour from the artwork and find a similar coloured rug. Don't put a mantle over the fireplace - it could be a health hazard - bumps and bruises. Blinds - unless you want them to make a statement I think white - to match window frames would be fine.

Thanks Anne and I will look at pale grey given the maintenance considerations. I have already paid for a colour consultant who was great but the Reckless grey she suggested for the house render and basalt gutters/fascia and front wall were too grey when we had the render samples put on and while it had a modern look, it was not giving the beach/coastal feel. I will head back into our inspirations paint store this morning to see if I can find the warm grey colours that have the most similar colour make up to Dune, and go from there. Anne you don't happen to know the dulux colour most close in composition to Colorbond Dune so I know where to start? Thanks again and I would love to hear from anyone who has got a dune roof and hear if they tried light coloured gutters and what render colours they have used on their walls.

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.