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


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

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


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.


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 value0
Applies toall elements
Computed valueas specified, but with relative lengths converted into absolute lengths
Animation typea length

Formal syntax



Setting outline offset in pixels


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


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



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

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
outline-offsetChrome Full support 1Edge Full support 15Firefox Full support 1.5IE No support NoOpera Full support 9.5Safari Full support 1.2WebView Android Full support 37Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 14Safari iOS Full support 1Samsung Internet Android Full support 1.0


Full support
Full support
No support
No support