Scallopini is similar to Dune? The dutch gable's (triangle's) would be better in Shale Grey as would Facia and gutters. Monument gutter ok but could be a bit much. Monument to roof and garage door. Monument to window frames as well rather than black? Depends on builder window company. Scallopini to walls. That way really just 3 colours.

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Maybe a cream or stone based white colour if the awnings are going to stay? This would also match the roof and could be ok with the gutters if you don’t want to change them.

Everything that is yellowy beige , I would do in monument or similar charcoal ( well , I'd leave the gutters in the short term , I'll explain in a sec ) . Yes , including the window frames . Maybe even especially the window frames . The render -- Vivid white , Natural white , even something a bit different like Handmade Linen . Nothing blue tinged , or yellowy creamy . Oh , not grey in any form -- look at how uninspiring the render looks now ! So 'almost' black and white , with an earthy reddy brown roof . A new letterbox ( or paint that one , but me I'd go a $100-150 one with style ) . And don't forget -- the gutters are still that yellowy cream . Now to me , you have 2 choices -- do them charcoal too -- the whole place is sharper and cleaner , the disadvantage may be the roof looking tired and aged ? Or go a really vibrant red and take the focus off the roof , but within that spectrum . That would be my thinking .