Red Cardigan Sweater

So Im going to a dance with my girlfriend and she wears red .... So we have to match.
i just didn't want to wear a tuxedo or dress like everyone else ...
So I made a cardigan sweater and black shirt, red ...

but what color pants should i wear??? gray? with black shoes??

The perfect pair of pants would be something like this:

http://www.bananarepublic.com/Asset_Arch ...
http://images2.pacsun.com/is/servlet/izo ...
http://www.bananarepublic.com/Asset_Arch ...

shoes with black dress and a skinny black tie. Good luck!

Yes gray .. light and black shoes. is exactly what I suggest.

if you want to pop the red wear pants and black shoes.

If you leave the show shirt under the vest, I guess its ok to wear black trousers. If you do not do that, wear a neutral gray pants with black shoes. light gray would be too weird. and not too stressed about it either! may seek the advice of your girlfriend too because it is one that counts!