I would wait until you move in and get some test pots and brush the colours out on big pieces of leftover wall paper. What suits will also depend on your furniture etc. I would be cautious painting the aluminium as going light over dark is likely to scratch and be obvious. I quite like the timber - but the colour it doesn't go so well with the timber floor - perhaps the other walls need to be painted a cleaner white as suggested and the timber wall to go darker to act like a frame to your view Alternately you could also paint the timber the same colour as the walls but it will need to go with your floor as this is the limiting factor. all the best with your new home.

Hello Of course it depends on the 'mood' you wish to create in your living spaces Colour is returning to home decorating now to add interest to neutral spaces I wonder if you would be brave enough to try a beautiful pastel turquoise to your spaces??? Like this I especially like the last one as it has grey in it

Match to garage roof colour. Maybe a 'timber look' panel lift door. Matching to the facade could mean a mismatch of similar colours hence my suggestion of roof as its close by yet far enough away.

You should do a google search of “ teal headboard “ and there are many images which should help . Similar shades to those Dulux ones will be there . When your bed is ready , paint a few shades in strips to see what works with your bed head and carpet .