Why not use Surfmist? If you want a dark colour use Monument. You don’t want to have a house that is a patchwork

I agree with bigreader - either the same colour as extension or the same colour as windows and trim.

Surfmist

I agree, your mock up looks beautiful, definitely do monument, would look stunning plus any landscaping would look wonderful against monument. It would be a real showstopper.

I’d go Surfmist for continuity. You don’t want it to look like an add on

I actually like the dark option, it looks more interesting and highlights your landscaping better.

It also marries the carport into the house better so it looks more refined.

If you go dark at bottom introduce some more light in the landscape to balance as per the inspiration pics. Kerbs, pots, flowers …

Using timber features around entrance and carport will work wonders.

Agree siriuskey, a timber screen on the carport would look fabulous, adding a touch of privacy as well, adding a touch of timber against the dark render would look stunning

I actually disagree with the timber slats, they work with a modern shaped home but your home is more traditional so they will look out of place in my opinion, kind of like one too many elements, if you like the sound of the privacy then add them but I would stick to a charred finish so it blends with the dark paint instead of another contrast maybe like a Shou sugi ban

It’s going to look fantastic, you could also add a bit of garden art, solar night sculptures that look great in the day also, a large planter or water feature in corten steel or something of similar colour to highlight your entrance and look amazing against monument. Can’t wait to see your beautiful house.