Orange pants? Uh.. you maybe should where a different color of pants, black or white are the only real colors that will match, unless your favorite sports team has orange, then you can get a shirt with their color that will match. :D
Yes, black goes with anything.
No. Do not mix brown with black.
A solid black shirt would match best with light gold pants.
No, light grey and fluro- no way.
white, green, pink, red, orange any color but black/gray would work
yes.
Light Blue Jeans Dark Blue Jeans Black White or black and white patterned bottoms
Rusty orange
yes.. black goes with anything.
Black, white, a darker or lighter shade of grey,
I would say that black pants would match.