consider the darker grey for the walls with the light colour for roof to be better for heat refection and the BASIX rating

Thanks, yes we currently have a Windspray roof on a small cottage, which I've considered using again, however was thinking of a darker grey roof this time, to contrast with the brick and blend with landscape. We have a lot of gum trees around the place and a large Woodland grey tank that blends in well. The tank is for the new house, so I was thinking of using the Woodland grey roof to tie in with that. I could use the Woodland grey for the cladding instead (which would also mean the window frames wouldn't stand out), but I'm not sure if it will look too green (I like Woodland on roofs but haven't seen it used for cladding). If we did use it for the cladding, I'm not sure if Windspray would be the right colour for the roof, as it has a blue tinge to it, which is nice but might not work with the greeny grey of Woodland? I also thought Dune might be a better tone with the reddish bricks. I'd like whatever light grey colour we use to look as neutral as possible, as the bricks and timber are the features. I'd use galvanised iron but am told it's not as durable as Colorbond, and Zincalume is too shiny.

many traditional old homes have galvanised roofs and the gal does soften from shiny to dull as it oxidises and then lasts for as long as any of us should need

What about galvanised corrugated cladding? Like the sheep shearing sheds. Looks magnificent with timber decking and recycled bricks.

Here is a good article you can google. Helps explain the durability of the materials. This is just a screenshot of first page. For some reason, it won't load onto this post. I'll repost the website for you.

https://www.tweed.nsw.gov.au/Download.aspx?Path=~/Documents/Planning/Heritage/TSC06631_Heritage_Fact_Sheet_5A_Understanding_galvanised_steel_or_colorbond_roofs.pdf

Thanks everyone, yes I love the look of old shearing sheds, which is the rustic look I'd ideally like to achieve, however the house design is a bit more modern - it is a long rectangular shape like a shed but the roof is curved at the top (like the Glen Murcutt house in Kempsey) instead of the traditional pointed gable. We're actually thinking of using the Ritech product for the roofing instead of Colorbond, as it has a high bushfire rating and comes in Colorbond colours. We like the darker grey roof because it doesn't stand out too much in the bush landscape and therefore 'anchors' the house. So as much as I love rusty gal, I think we will have to leave it to the outsheds (our current cottage 'the shack' is clad in the old galvanised roofing, which we replaced with a Windspray colorbond roof). It looks great because it's already rustic. I'd also like to use it as a feature inside the house (e.g. behind a woodstove) but don't have enough to clad the new house. The Dune colour is a good match with the creamy grey trunks of the Brittle gums, which is why I thought of using that. I also read somewhere that it's the best match with traditional gal (which I've tested and tend to agree with, although it doesn't have the rustic colour variation). Dune is also a good tonal contrast with the darker bricks and timber, so I'll probably go with that for the cladding as we don't really want a light roof, despite better reflection properties. I'm hoping having the high roof inside (to 4.8m at highest point of the curve) and good insulation will mean a darker roof is okay. My only real concern now is that I can't get standard aluminium windows in the colour Dune (they come in Shale or Woodland grey). I might be able to have them made in non-standard colours, but it would cost a lot more. Hence I'm thinking Woodland grey for the window frames, but am not sure if this would make it look too busy (i.e. with the bricks, timber and lighter cladding).

Our house has galvanised steel cladding, recycled bricks and spotted gum cladding/decks and Colorbond roof. It is a very modern design.

Sounds great! Did you buy the gal new? And what kind of window frames did you use? I'd love to see a photo if you have one.

Yes, I also tried loading a photo of our house design but it won't load

annb1997 - also are you happy with the look of the darker window frames against the lighter gal cladding?

Yes I am. I'll upload another photo showing you the contrast. Go to my Ideabooks and look at the Exterior Cladding Ideas one.

Evening Haze looks good with Woodland Grey as does Bushland if you want a green. Woodland looks quite good for window frames.