Rania: Change border colors in the Interstitial Grid posts

If you’re using Rania’s interstitial grid post feature on your Home Page, you may wish to adjust the color of the border. The Code Hack below will adjust the color of this border. Note that if you’re using our Grid plugin, the code below will also change the color of all borders on your Grid pages.

Tip: The border surrounds the entire post entry, including the photo. We recommend choosing a light color, so that the contrast looks aesthetically pleasing. Alternatively, you might wish to apply a background color instead, and remove the border feature altogether.

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

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