Mozilla's getting a new look. What do you think? https://mzl.la/brandsurvey

Summary

The outline-color CSS property sets the color of the outline of an element. An outline is a line that is drawn around elements, outside the border edge, to make the element stand out.

Initial valueinvert, for browsers supporting it, currentColor for the other
Applies toall elements
Inheritedno
Mediavisual, interactive
Computed valueFor the keyword invert, the computed value is invert. 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 rgb(0,0,0).
Animation typea color
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

/* Keyword values */
outline-color: invert;
outline-color: red;

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

Values

<color>
See <color> for the various color keywords and notations.
invert
To ensure the outline is visible, performs a color inversion of the background. This makes the focus border more salient, regardless of the color in the background. Note that browsers are not required to support it. If not, they just consider the statement as invalid

Formal syntax

<color> | invert

where
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>

where
<rgb()> = rgb( <rgb-component>#{3} )
<rgba()> = rgba( <rgb-component>#{3} , <alpha-value> )
<hsl()> = hsl( <hue>, <percentage>, <percentage> )
<hsla()> = hsla( <hue>, <percentage>, <percentage>, <alpha-value> )
<named-color> = <ident>
<deprecated-system-color> = ActiveBorder | ActiveCaption | AppWorkspace | Background | ButtonFace | ButtonHighlight | ButtonShadow | ButtonText | CaptionText | GrayText | Highlight | HighlightText | InactiveBorder | InactiveCaption | InactiveCaptionText | InfoBackground | InfoText | Menu | MenuText | Scrollbar | ThreeDDarkShadow | ThreeDFace | ThreeDHighlight | ThreeDLightShadow | ThreeDShadow | Window | WindowFrame | WindowText

where
<rgb-component> = <integer> | <percentage>
<alpha-value> = <number>
<hue> = <number>

Example

HTML

<p class="example">My outline is blue, da ba dee.</p>

CSS

.example {
  /* first need to set "outline" */
  outline: 2px solid;
  /* make the outline blue */
  outline-color: #0000FF;
}

Live:

Specifications

Specification Status Comment
CSS Basic User Interface Module Level 3
The definition of 'outline-color' in that specification.
Candidate Recommendation No change
CSS Transitions
The definition of 'outline-color' in that specification.
Working Draft Defines outline-color as animatable.
CSS Level 2 (Revision 1)
The definition of 'outline-color' in that specification.
Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 1.0 1.5 (1.8) [1] 8.0 7.0 1.2 (125)
invert value No support No support [2] 8.0 No support [3] No support
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? ? ? ? ?

[1] In versions previous to Gecko 1.8: -moz-outline-color.

[2] Support had been dropped in version 3.0 (1.9).

[3] Supported in Opera 7 but support was dropped in  Opera 15 with the adoption of Chromium/Blink engine.

Document Tags and Contributors

 Last updated by: Sebastianz,