I had a F10 530d in Carbon Black. On a dull day it looks almost black alright but when the sun shines it certainly looks like it's metallic navy in colour:

https://postimg.cc/mhWKqKKB

https://postimg.cc/PNM1H8VN

Lovely colour after a wash but definitely high maintenance. Every dried in droplet of rain as well as the most modest of scratches or stone chip will show up on it.