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outline-offset

The outline-offset CSS property sets the amount of space between an outline and the edge or border of an element.

An outline is a line that is drawn around an element, outside the border edge. The space between an element and its outline is transparent. In other words, it is the same as the parent element's background.

Syntax

/* <length> values */
outline-offset: 3px;
outline-offset: 0.2em;

/* Global values */
outline-offset: inherit;
outline-offset: initial;
outline-offset: unset;

Values

<length>
The width of the space between the element and its outline. A negative value places the outline inside the element. A value of 0 places the outline so that there is no space between it and the element.

Formal syntax

<length>

Example

p {
  outline: 1px dashed red;
  outline-offset: 10px;
  background: yellow;
  border: 1px solid blue;
  margin: 15px;
}
<p>Gallia est omnis divisa in partes tres.</p>

Specifications

Specification Status Comment
CSS Transitions
The definition of 'outline-offset' in that specification.
Working Draft Defines outline-offset as animatable.
CSS Basic User Interface Module Level 3
The definition of 'outline-offset' in that specification.
Recommendation Initial definition
Initial value 0
Applies to all elements
Inherited no
Media as each of the properties of the shorthand:
Computed value as specified, but with relative lengths converted into absolute lengths
Animation type a length
Canonical order the unique non-ambiguous order defined by the formal grammar

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 1 ? 1.5 No 9.5 1.2
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support ? ? ? ? ? ? ?

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/outline-offset