Hi, interestingly I have been grappling with this issue recently! For a contemporary design I have firmly decided that dark bronze or black frames suit much better as they are visually recessive and give the optical illusion of larger glazing and help create an indoor-outdoor connection. White frames tend to focus your eyes on the frames/window rather than the space and form, however you can get these to work if you use very slender frames (which are more expensive) or if you are purposefully using traditional design cues. I know this doesn't help as you already have the DA, so if you can go with the silver pearl that is a good option, and perhaps use the words "dark beige" to darken the render!

Yes I was asking another question, given the light on the property , would white frames be too glary/stark? Also there are different types of rendering- the acrylic and the painted on ,anyone know how much more expensive the acrylic might be?

Assuming no other exterior upgrades other than the timber paneling, I'd be using the same colour as the garage door- it looks like Paperbark (the beige on the eaves/gutters looks lighter). I'd personally be getting the roof checked before dealing with aesthetics like timber paneling- it looks old, potentially needing a clean and reseal (or paint with Woodland Grey, would look great with Paperbark) and the pointing re-done to prevent leaks.

I would look at some exterior screens rather than tying to paint powder coated aluminium windows and frames.