Change Font Color for Only One of Page Titles in Menu Bar

Hello,

I want to make the font of one of my page titles in the menu bar stand out. See how the "Subscribe" text in orange on this site: http://www.thegoldandoilguy.com/

I know how to change the color of the entire menu bar, but how do I go about changing the font color for just one page title in the menu bar?

Thank You,
Jason