I don't think you can go wrong with a large timber door. The colour should contrast with the granite nicely and will even help soften all the colder surfaces. Have you seen any doors you like? https://www.houzz.com.au/products/front-doors-prbr0-br~t_10816

Extending the woodland grey as the colour for the pergola, windows and timber will complement the terracotta bricks nicely and give it a more contemporary edge. However I would use a complementary colour to both woodland grey and the brick colour to make the new door more of a feature. I would consider a deep olive green, similar to Colorbond's Mangrove which will work well. Best of luck with the selling, Dr Retro of Dr Retro House Calls

perfect

I just looked on the Dulux charts , and colours like Strong Strawberry or Rusted Crimson are earthy but have that reddish/burgundy vibe , and would blend in but still brighten the entrance . The other option would be a real bright red to really lift the space and add the Wow , although as it seems it isn't seen from the street , it probably won't schieve much , so more toned down earthy burgundy reds may be the go .