mkdocs-material/docs/guides/changing-the-fonts.md

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overrides/main.html

Changing the fonts

Configuration

Default: Roboto and Roboto Mono

The Roboto font family is the default font included with the theme, specifically the regular sans-serif type for text and the monospaced type for code. Both fonts are loaded from Google Fonts and can be changed to any supported typeface, like for example the Ubuntu font family:

theme:
  font:
    text: Ubuntu
    code: Ubuntu Mono

The text font will be loaded in weights 400 and 700, the monospaced font in regular weight. If you want to load fonts from other destinations or don't want to use Google Fonts for data privacy reasons, just set font to false:

theme:
  font: false

Customization

TBD