Our roof is Jasper and our facade is Hog Bristle triple strength (previous owner's choice). In the shade the combination looks good but in the sun I think the walls look too yellow. We recently painted our front rendered fence in Hog Bristle (single strength) and we like it much better than the triple. In the sun it looks a lot like Surfmist but with slightly more warmth (I had a couple of passerbys asking if it was Surfmist). I also think Dune looks great with Jasper. We live in SE Qld and do not find the dark-coloured Jasper roof heats up the house at all (we have roof tiles, not colorbond, and we have roofing insulation). I tried to take some photos to upload but as its a drizzly day, the colours are looking all wrong.

Do a google image search of "nuts and berries architecture", "sevitt and Pettit", and perhaps "Sydney school architecture". Your house has been inspired by those styles/movements from late 60 and 70s Australian architecture and you should be able to find images of sensitive renovations that inspire you.

Maybe paint facials white and put some white cladding in front gable so eye drawn to that not windows not a blue tinged white eg not dulux lexicon but warm white to go with cream blinds eg natural or polar white or grand piano 1/4 strength would also go nicely with woodland Grey and jasper - cb basalt also goes nice with woodland Grey maybe go 1/2 strength on walls as it’s a nice neutral black/Greywhixh would detract from purple tinge

What are the houses (street / neighborhood) around you like? Many houses being renovated and moving away for the original designs? Or, more minimal cosmetic facelifts? With your spotted gum decking, you'll have a timber clash with the front door. Might need to work around that as well as maintaining connection to the street / area. Kate is on the money ... put the new deck in and upload a picture then. Too many variables with how the deck will look when finished vs the front door and style of the home etc.