PowerPoint 20 (Mac) had a significant number of color themes built-in, but the latest versions of PowerPoint have fewer color themes and most are now named and organized by the color wheel. If you hover over the color themes, you can get a preview of what your slide would look like. You will find these color themes on the Design Tab, using the Variants menu and the drop down arrow, clicking on the colors menu and choosing a color theme. This is a quick way to apply colors to your presentation if you don’t want to spend time on creating your own. PowerPoint comes with a number of built-in color themes available for use.