Miramar: Apply color to the entire header area background

By default, the Miramar header is set on a white background. This Code Hack allows you to add color to the background instead. The code below will apply color to all parts of the header, including behind the Top and Social menus, the logo, and Primary menu location.

Here's what this Code Hack looks like in action:

And here's the code you need to implement it: