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 :)

What style bedding are you drawn too? What is the wall colour? Inspiration: Black and white (or off-white) with deeper green accent pillow. Though this room is not carpeted , I thought this room would give example of how the colours and wood tone work together.

A grey colour with a green undertone could work nicely... this way working with the green fencing and trims. sample pots are definitely a must so you can play with strength of grey and ensure correct undertone. If budget allows vertical cladding could transform the space further and create visual height...

Hi, we had the charcoal next gen decking installed 6 months ago for similar reasons - fully exposed deck, no time to maintain. Went with charcoal after much debate as we didn’t want it to look like fake wood but rather something different and modern. We’re happy with the outcome