No, not on the same wall. It is possible to have different colours inside, in different rooms, but outside, each exterior plane should be consistent.

When I got the colour samples I thought monument was the one for sure and that Ironstone was too blue. However once home and looking at the colours in different spots, Ironstone really stood out out as a complement to the brick. The brick is inside as well but we are intending to render that. The ironstone looks very nice with Dulux Hogbristle etc and these are colours and tones that I love so am hoping will look good. We have started on the bathroom which I am keeping simple, black matt floor and gloss white walls and adding colour with accessories. Thanks all with your comments. I am sure I will have more questions as we go along as this is a fairly big job!!

Matt Black Powder coat is definitely and on trend colour and comes with a 10 year warranty over against anodised which only has a 5 year warranty. Check our our post on choosing your aluminium colour https://www.houzz.co.nz/discussions/having-trouble-choosing-your-window-colour-dsvw-vd~5385114

There is an inherent charm to timber-framed windows due to the proportions of the frame. There are lots of different styles of aluminium windows, but most of them do not have the same proportions - they usually have a much thinner frame, and often look cheap and flimsy. The other problem with most aluminium windows is that they conduct heat and cold which usually negates the benefits of double glazing. If you are firm about going with aluminium windows then consider thermally broken window frames, which have better proportions and don't transfer the heat or cold through the frames. They don't look cheap, as they are not! Also check out the hybrid windows which are powder-coated aluminium on the outside and timber on the inside. https://www.miglas.com.au/aliclad If budget is an issue and it doesn't stretch to thermally-broken aluminium of hybrid timber/aluminium windows then go with timber for the warmth and character. Never go with cheap, flimsy looking aluminium frames when trying to be consistent with a period home. Best of luck, Dr Retro of Dr Retro House Calls