It looks like you home has had lots of renovations and changes over the years so I wouldn't be too concerned with getting a new scheme that is completely authentic, but something that works with the elements that you can't change easily. The large bricks were probably a smooth faced concrete block, not a terracotta brick , I am not too sure what the pock-marking is under the window? Can you share a photo of the brickwork near the front of the house? Best of luck, Dr Retro of Dr Retro House Calls https://secretdesignstudio.com/services/dr-retro-house-calls/

what a great looking house, love the windows and bricks ...i would maintain the existing mid century look of the house by first repairing any damage and cleaning all the concrete, keep the varnished eaves, paint windows and trim white again and repaint the handrails in a very dark brown or grey and maybe a a bright colour like deep turquoise or acid green for the front door ..it would be so much better to embrace the original style of the house instead of attempting to "modernise" it too much...it's difficult to tell from the photos but with a flat roof the fascia might also look good in the same dark colour as the handrails

To bring rhythm and flow with the house I would continue to use the monument on the garage door to bring connection of the deck with the house. Use the same for the baton on the deck. If doing the roof look to a similar colour as monument or in fact the same. Perhaps look at Half or Quarter monument for the concrete steps up to the front door. Paint your front door a colour to draw the eye..perhaps a dark, mid blue. The guttering looks in good condition but I would paint that the same as the roof including the downpipes. Go for a standard white under the eaves. I feel like you need something to the left of the garage to balance things out for street appeal. Greenery planted to hide the gap up to bottom of deck but planted towards the street to allow a meter gap to walk through from left of garage.

Do you like the look of: darker roof, lighter walls or lighter roof, darker walls ?? Surfmist roof being already light, means going white white for the walls if you want the roof to be darker than the walls. If going darker walls, the options are wider, from half or quarter dune or evening haze type tones through to windspray or even mild green (half or quarter strength cove) type tones. https://st.hzcdn.com/simgs/00a1928d05557947_4-9497/home-design.jpg LOTS of images on the web of houses with surfmist roofs, so plenty of inspiration out there...