Presidio: Change font size and color of the featured interstitial title

The Featured Interstitial space sits just below the Featured Post, near the top of Presidio's Home Page. This Code Hack allows you to change the color and font size of the title that sits above your embedded widget.

Here's what this Code Hack looks like in action if you have enabled the Shopping Widget under Appearance > Customize > Shopping Widget.

Here's what this Code Hack looks like for all other types of widgets placed in the Featured Interstitial widget area.

And here's the code you need to implement it. Be sure to read the code carefully to grab the pieces relevant to the widget you've embedded!