I've just been looking at your colours, I think the Dulux Dieskau would work the best with the other colours you have to work with, choosing colours is such a personal thing and I know it can be really hard to choose and hope you make the correct choice. Oskuee is right, a paint job can look terrible half way through so you need to make sure you finish to get the proper look of colour. But the biggest thing to remember is it's only paint and it's the cheapest thing to change so if your not happy with the colour you choose you can always try something else. Happy redecorating :)

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.?

Option 3 has a terrazzo-look tile which references the previous and original bathroom. The concrete look tiles will date, and look quite daggy in ten years time. Best of luck, Dr Retro of Dr Retro House Calls

you could look at staining this one>? Bamboo Woven Ply - Bamboo Australia | Sunshine Coast or may I suggest a good detail joiner could make it to your custom panel sizing and finish it suitably for the kitchen splashbacks (if that is what it is for>?) I can suggest someone who would be able to custom make this if you wish.