Changing fonts

Furo makes it fairly straightforward to change the fonts across the entire page.

This is done by changing the values of the relevant CSS variables: font-stack (for regular text) and font-stack--monospace (for code blocks and inline code). This can be done using Furo’s mechanism for setting CSS variables – specifically by setting them as the fonts for the light mode (which is inherited by the dark mode).

html_theme_options = {
    "light_css_variables": {
        "font-stack": "Arial, sans-serif",
        "font-stack--monospace": "Courier, monospace",


It is strongly recommended to not change the fonts unless there is a strong reason (such as brand identity) since Furo’s default fonts are carefully selected to look good across all major platforms.