Different menu for portfolio page

Hi,

I’m trying to create a portfolio page with a different menu because my main menu has a white logo and text but when it is used on a portfolio page, the background is white so the logo and text cannot be seen. Is there anyway to create a different menu for the portfolio page so I can have a menu with dark text on the white background (of the portfolio page)? I see on the demo site, that there are 2 menus being used: 1) white logo and text for the home page and 2) dark logo and text for the portfolio page.

Thank you.