One of my preferred colours for natural exteriors is urban grey.. It is between a dirty concrete grey or a grey toned coffee colour. It would be similar to the wallaby, I also like the shale grey as a nice cool base. Without seeing your facade, colour blocking is a risk. As I can't suggest where to apply colour for definition etc. your windows are a great choice, and wallaby is very versatile, both suited to contemporary architecture or traditional period styles.

House is in Wagga, usual 1 level, on a flattish section, lounge and bedroom at front plus double garage.

checkout colorbond.autech.com.au/onlinevisualiser/ for help but love the anodised windows so consider matching anodised alum roller door and matching roof colour (shale grey is a close match to anod alum in you need to paint) (light roof and dark walls and very dark gutters and trim) what about different to the grey on grey and check the colours in the park for some inspiration...what about Colorbond Cove, Gully or Mangrove and Evening Haze with a timber front door and feature front fence/letterbox in timber with a native garden

Don't make colour decsions based on digital photos found on the internet. They are only indicitive as there are too many variables with lighting, angles, and screen adjustment to be accurate. The ONLY way is with real samples, on-site at different times of day. Best of luck, Dr Retro of Dr Retro House Calls