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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.

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.

Description

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.

Formal definition

Initial value 0
Applies to all elements
Inherited no
Computed value as specified, but with relative lengths converted into absolute lengths
Animation type a length

Formal syntax

<length>

Examples

Setting outline offset in pixels

HTML

<p>Gallia est omnis divisa in partes tres.</p>

CSS

p {
  outline: 1px dashed red;
  outline-offset: 10px;
  background: yellow;
  border: 1px solid blue;
  margin: 15px;
}

Result

Specifications

Specification Status Comment
CSS Basic User Interface Module Level 3
The definition of 'outline-offset' in that specification.
Recommendation Initial definition

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
outline-offset 1 15 1.5 No 9.5 1.2
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
outline-offset 37 18 4 14 1 1.0

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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