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.

/* <length> values */
outline-offset: 3px;
outline-offset: 0.2em;
/* Global values */
outline-offset: inherit;
outline-offset: initial;
outline-offset: unset;

Initial value	`0`
Applies to	all elements
Inherited	no
Media	visual, interactive
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

Syntax

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.	Candidate Recommendation	Initial definition

Feature	Chrome	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	1.0	1.5 (1.8)	No support	9.5	1.2

Feature	Android	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
Basic support	?	?	?	?	?