outline-color

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-color CSS property sets the color of an element's outline.

Try it

Syntax

css
/* <color> values */
outline-color: #f92525;
outline-color: rgb(30 222 121);
outline-color: blue;

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

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

Values

<color>

The color of the outline, specified as a <color>.

The specification also lists an additional value, auto, which is not currently supported in any browsers. When implemented, auto will compute to currentcolor unless outline-style is set to auto then it will compute to the accent color.

Description

An outline is a line that is drawn around an element, outside the border. Unlike the element's border, the outline is drawn outside the element's frame, and may overlap other content. The border, on the other hand, will actually alter the page's layout to ensure that it fits without overlapping anything else (unless you explicitly set it to overlap).

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

Accessibility

Custom focus styles commonly involve making adjustments to the outline property. If the color of the outline is adjusted, it is important to ensure that the contrast ratio between it and the background the outline is placed over is high enough that people experiencing low vision conditions will be able to perceive it.

Color contrast ratio is determined by comparing the luminosity of the text and background color values. In order to meet current Web Content Accessibility Guidelines (WCAG), a ratio of 4.5:1 is required for text content and 3:1 for larger text such as headings. Large text is defined as 18.66px and bold or larger, or 24px or larger.

Formal definition

Initial valueauto
Applies toall elements
Inheritedno
Computed valueFor the keyword auto, the computed value is currentcolor. For the color value, if the value is translucent, the computed value will be the rgba() corresponding one. If it isn't, it will be the rgb() corresponding one. The transparent keyword maps to rgba(0,0,0,0).
Animation typea color

Formal syntax

outline-color = 
auto |
<color> |
<image-1D>

<image-1D> =
<stripes()>

<stripes()> =
stripes( <color-stripe># )

<color-stripe> =
<color> &&
[ <length-percentage> | <flex> ]?

<length-percentage> =
<length> |
<percentage>

Examples

Setting a solid blue outline

HTML

html
<p>My outline is blue, as you can see.</p>

CSS

css
p {
  outline: 2px solid; /* Set the outline width and style */
  outline-color: #0000ff; /* Make the outline blue */
  margin: 5px;
}

Result

Specifications

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

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-color

Legend

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

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

See also