is it possible to change the background color of part of a page... ie, keep navigation bar the same but change everywhere else?

Site URL: http://www.joequint.com/joe

I'd like to keep the navigation bar on the left grey but have the content side white. and it would be only for this page... not side-wide.

jpeg layout attached.

thanks.

Add to Page Header

<style>
  div#pageWrapper {
    background: white;
}
  div#headerWrapper {
    background: gray;
}
</style>