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css pseudo class

`:root` CSS pseudo-class

View on MDN ↗

The :root CSS pseudo-class matches the root element of a tree representing the document. In HTML, :root represents the <html> element and is identical to the selector html, except that its specificity (0-1-0) is higher than html’s (0-0-1).

/* Selects the root element of the document:
   <html> in the case of HTML */
:root {
  background: yellow;
}

Syntax

:root {
  /* ... */
}

Examples

Declaring global CSS variables

:root can be useful for declaring global CSS variables:

:root {
  --main-color: hotpink;
  --pane-padding: 5px 42px;
}

Specifications

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.

See also