Ingunn, I think there is trend and then there is staple. Nude, for me, is not trend, it's staple, because of the bookend effect. When I stop coloring my hair and eventually go gray/white/silver, my new staple might be gray/white/silver instead!
Right now it seems to me black footwear is the trend, so I have been totally jonesing for adding black shoes, but they have to be super strappy, like cage heels, or with low vamp, for it to work for me (other than winter when it's boots and black skinnies tucked in). Not a staple so I won't be filling my closet with investment black footwear. Just a select shoe or two.
As for your medium brown hair, the plus is that you could easily adopt either the nude trend OR the black trend with ease. But, what is your staple? I have to imagine it's brown, not black not nude. And bronze would be your staple metallic.
Brown shoes do seem to be easy enough to find but as a trend.... hmmm... I think it's been about 10 years since I've seen that? Which means your time is coming up soon. So I predict, in another year or two, brown footwear will be the next big thing.