Summary

Standard metadata names

Theme color

See theme-color in Mozilla docs.

The theme-color value for the name attribute of the element indicates a suggested color that user agents should use to customize the display of the page or of the surrounding user interface. If specified, the content attribute must contain a valid CSS .

<meta name="theme-color" content="#4285f4">

Color scheme

<meta name="color-scheme" content="light">

<meta name="color-scheme" content="dark light">