Paint opinions

I’ve started up on my breacher team and I wanted to get some opinions on what I should use for the other bits of them. The main color is obviously copper and their sept color is silver which I have already sprinkled around. What color do you guys think would look good on the little bits on his backpack and maybe his lenses and stuff? I was thinking a deep red color something that would stand out. Also, thoughts on the bottom of the helmet being silver, or would that look better being copper?

Thanks