Sometimes you may want to forgo an image or video asset in favor of a colored background card. These make a clear canvas to host a text overlay with long content, chapter card, or visual break / palette-cleanser within your video.
Here's how to set up a background card and add it to your timeline:
In review, here are the steps:
In the timeline view, click the "Background card" icon
Select "Your Brand," "Recent," or enter a HEX/RGB value for your color
Select Solid or Gradient (if gradient, use the slider to control the appearance)
Set the Hue, Saturation, and/or Lightness
Click "Add"
Drag your background card from the lightbox to the timeline