You can even use an image file instead of a solid color. This makes for an easy way to watermark screenshots: You just use a background image that includes your watermark.

How to Change the Background Color in Instagram Stories. There is a better method that will get you a much nicer looking Story, while still granting you control over the color of your background.

You can change the color of the entire page using a solid color, a gradient or even a picture using Publisher's Page Background feature. Launch Publisher and open the publication that contains labels.