@jactheshe, it would be very hard to imagine. Even digital photos of the colours together can look so different. And depending on how your house is situated & how the light plays on it, that changes things again. I was looking at a picture online of a house using woodland grey with colorbond dune. The dune colour looked completely different to the colour card on the charts. If you have some large lightweight boards around, I suggest painting them out with colours you're considering. Or getting a large sheet of foam core from office supplies or sign companies and using that. It would be light enough to attach temporarily on the facade & give a better idea of which colour works. That way the angle how the light hits the colour is accurate.

Silk would be interesting, not to mention elegant. As for paints, the Silver Illusion appeals, but it might throw green (not sure). I also agree the Tranquil Retreat is a good one. I'm wondering how big the feature wall is, and what is going on this wall, eg TV, fireplace, large artwork, etc.?

What natural light do you get in the room/what orientation? i.e. is it a 'cold' or 'warm' room? If it's a colder room, I'd go with a grey with orange/red undertones to warm it up a bit, or if it's a warm room you could get away with a cooler grey, maybe green undertones to compliment the maroon. Or you could even try a green rather than grey. The Aerobus is a blueish grey so will be cooler. As others have said you would probably want a lighter tone than this for the walls (unless you're purposely going for a dark dramatic mood). 'Miller Mood' is a couple of shades up in the Colour Atlas. Get sample pots and paint a section on each wall, or paint a white bit of card and stick to the wall to see how the light is at different times of day.

Did you both use it in any other parts of your house out of interest? That's what we're looking at doing, daughter's bedroom is first. We've put the three selections on her wall in the quarter, half and full strength. She hasn't chosen which one she wants yet, but has always said she wants grey so guessing she'll go for the full strength. Hubby and I are liking mid strength at this stage which we'll use for the rest of the house I think.