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!

I have replaced my windows with black and black screens and it looks fantastic. The only thing you should be careful of is having screens done by window manufacturers. I have done that mistake and quality is not the same as crimsafe which I have on the doors . I would insist on crimsafe if they can’t provide it get them done yourself.

some photos would explain the dilemma

Personally I would go with silver. I would find another supplier unless they are significantly more expensive. Probably shouldn't be anymore expensive as they're pretty popular still. Nevertheless I would go with white, charcoal or my personal favourite silver. These are timeless colours and will usually work with almost anything.