You can apply any theme you like to your PowerPoint Slide Master via the Edit Theme group in the Slide Master tab on the PowerPoint Ribbon. To change the theme for a PowerPoint Slide Master, follow these steps:

1

Choose ViewPresentation ViewsSlide Master.

The Slide Master opens.

2

Click Themes drop-down list on the Slide Master tab to select your theme.

You can use the Colors, Fonts, and Effects controls to modify the color scheme, fonts, and effects used for the theme.