color-scheme

The color-scheme CSS property allows an element to indicate which color schemes it can comfortably be rendered in.

Common choices for operating system color schemes are "light" and "dark", or "day mode" and "night mode". When a user selects one of these color schemes, the operating system makes adjustments to the user interface. This includes form controls, scrollbars, and the used values of CSS system colors.

color-scheme: normal;
color-scheme: light;
color-scheme: dark;
color-scheme: light dark;

/* Global values */
color-scheme: inherit;
color-scheme: initial;
color-scheme: revert;
color-scheme: unset;

The color-scheme property's value must be one of the following keywords.

normal

Indicates that the element isn't aware of any color schemes, and so should be rendered using the browser's default color scheme.

light

Indicates that the element can be rendered using the operating system light color scheme.

dark

Indicates that the element can be rendered using the operating system dark color scheme.

normal | [ light | dark | <custom-ident> ]+ && only?

To opt the entire page into the user's color scheme preferences declare color-scheme on the :root element.

:root {
  color-scheme: light dark;
}

• Applying color to HTML elements using CSS
• Other color-related properties: color, background-color, border-color, outline-color, text-decoration-color, text-emphasis-color, text-shadow, caret-color, and column-rule-color
• background-image
• print-color-adjust