PowerPoint has a great ... Select a black fill and a medium blue outline (match the color used on the font). This gives the illusion of a matching border for the remaining pages.

As with many Microsoft 365 programs, PowerPoint can take ... In this example, I've added a green border to the slide's text area and changed the title font to blue. I have also moved the slide ...

While there isn't a built-in option for adding borders to a slide in PowerPoint ... in addition to changing fonts and backgrounds. And after you customize the border on one slide, you may find ...