Rania: Change footer background color

At the bottom of the Rania theme is a small, optional menu of links. By default, this menu is set on a white background, with gray text. It looks like this:

Some users may wish to adjust the colors of the footer, to add color to the background, or change the color of the links. Here is what this Code Hack looks like in action:

And here is the code you need to implement it!