How do I make my Instagram feed’s background transparent?

By default, Spotlight adds a white background to your Instagram feed.

However, if you’d like the Instagram gallery you’re displaying on your page to have a transparent background, meaning it will use the background color of the section of your page that it’s embedded into, you can do this as follows:

1. Go to Design > Appearance.
2. Click on the color for Background color.
3. In the color-picker, set the transparency to zero. 

It’s the second bar under the one with the rainbow, as shown below.

Before:

After: