Can a navy blue shirt go with black pants?

Answer 1

The traditional rule of fashion is that you don't wear navy blue and black together. Of course, rules (especially fashion rules) are meant to be broken -- for example, there was a time when fashion rules dictated that high heels should not be worn with jeans, and now it is done all the time -- but still, in my opinion wearing navy blue and black together just looks stupid.

If you're wearing navy blue or black, then you need a pale or a bright color to go with it: grey, beige, green, orange...anything but another dark color.