@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.

Personally, I prefer cool greys and Dulux Lexicon is one of my favourites, but depends on the overall look you're after and also what flooring you have... I also like Dulux Dieskau which is warmer & slightly darker, but you could go half strength

It was one of the colours the Dulux rep recommended. If you can, get sample pots and try them out. Best way to check your colours as photos don't always give a true reflection of the colour. Then you can have a look against your tiles and in different light.

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.?