outline-style

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2017.

The outline-style CSS property sets the style of an element's outline. An outline is a line that is drawn around an element, outside the border.

Try it

It is often more convenient to use the shorthand property outline when defining the appearance of an outline.

Syntax

css
/* Keyword values */
outline-style: auto;
outline-style: none;
outline-style: dotted;
outline-style: dashed;
outline-style: solid;
outline-style: double;
outline-style: groove;
outline-style: ridge;
outline-style: inset;
outline-style: outset;

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

The outline-style property is specified as any one of the values listed below.

Values

auto

Permits the user agent to render a custom outline style.

none

No outline is used. The outline-width is 0.

dotted

The outline is a series of dots.

dashed

The outline is a series of short line segments.

solid

The outline is a single line.

double

The outline is two single lines. The outline-width is the sum of the two lines and the space between them.

groove

The outline looks as though it were carved into the page.

ridge

The opposite of groove: the outline looks as though it were extruded from the page.

inset

The outline makes the box look as though it were embedded in the page.

outset

The opposite of inset: the outline makes the box look as though it were coming out of the page.

Formal definition

Initial valuenone
Applies toall elements
Inheritedno
Computed valueas specified
Animation typeby computed value type

Formal syntax

outline-style = 
auto |
<outline-line-style>

Examples

Setting outline style to auto

The auto value indicates a custom outline style, described in the specification as "typically a style [that] is either a user interface default for the platform, or perhaps a style that is richer than can be described in detail in CSS, e.g. a rounded edge outline with semi-translucent outer pixels that appears to glow".

HTML

html
<div>
  <p class="auto">Outline Demo</p>
</div>

CSS

css
.auto {
  outline-style: auto; /* same result as "outline: auto" */
}

/* To make the Demo clearer */
* {
  outline-width: 10px;
  padding: 15px;
}

Result

Setting outline style to dashed and dotted

HTML

html
<div>
  <div class="dotted">
    <p class="dashed">Outline Demo</p>
  </div>
</div>

CSS

css
.dotted {
  outline-style: dotted; /* same result as "outline: dotted" */
}
.dashed {
  outline-style: dashed;
}

/* To make the Demo clearer */
* {
  outline-width: 10px;
  padding: 15px;
}

Result

Setting outline style to solid and double

HTML

html
<div>
  <div class="solid">
    <p class="double">Outline Demo</p>
  </div>
</div>

CSS

css
.solid {
  outline-style: solid;
}
.double {
  outline-style: double;
}

/* To make the Demo clearer */
* {
  outline-width: 10px;
  padding: 15px;
}

Result

Setting outline style to groove and ridge

HTML

html
<div>
  <div class="groove">
    <p class="ridge">Outline Demo</p>
  </div>
</div>

CSS

css
.groove {
  outline-style: groove;
}
.ridge {
  outline-style: ridge;
}

/* To make the Demo clearer */
* {
  outline-width: 10px;
  padding: 15px;
}

Result

Setting outline style to inset and outset

HTML

html
<div>
  <div class="inset">
    <p class="outset">Outline Demo</p>
  </div>
</div>

CSS

css
.inset {
  outline-style: inset;
}
.outset {
  outline-style: outset;
}

/* To make the Demo clearer */
* {
  outline-width: 10px;
  padding: 15px;
}

Result

Specifications

Specification
CSS Basic User Interface Module Level 4
# outline-style

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
outline-style
auto
dashed
dotted
double
groove
inset
none
outset
ridge
solid

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
See implementation notes.
Requires a vendor prefix or different name for use.
Has more compatibility info.

See also