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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.

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Syntax

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

/* Global values */
outline-offset: inherit;
outline-offset: initial;
outline-offset: revert;
outline-offset: revert-layer;
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

outline-offset = 
  <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
CSS Basic User Interface Module Level 4 # outline-offset

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`outline-offset`	1	15	1.5 Before Firefox 88, an outline does not follow the shape of `border-radius`.	No	9.5	1.2	37	18	4 Before Firefox 88, an outline does not follow the shape of `border-radius`.	14	1	1.0