The outline-color CSS property sets the color of an element's outline. An outline is a line that is drawn around an element, outside the border.
It is often more convenient to use the shorthand property outline when defining the appearance of an outline.
/* Keyword values */ outline-color: invert; outline-color: red; /* Global values */ outline-color: inherit; outline-color: initial; outline-color: unset;
| Initial value | invert, for browsers supporting it, currentColor for the other |
|---|---|
| Applies to | all elements |
| Inherited | no |
| Media | visual, interactive |
| Computed value | For 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 rgba(0,0,0,0). |
| Animation type | a color |
| Canonical order | the unique non-ambiguous order defined by the formal grammar |
Syntax
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>. invert- To ensure the outline is visible, performs a color inversion of the background. Note that browsers are not required to support this value, in which case it is invalid.
Formal syntax
<color> | invertwhere
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where
<rgb()> = rgb( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<rgba()> = rgba( [ [ <percentage>{3} | <number>{3} ] [ / <alpha-value> ]? ] | [ [ <percentage>#{3} | <number>#{3} ] , <alpha-value>? ] )
<hsl()> = hsl( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )
<hsla()> = hsla( [ <hue> <percentage> <percentage> [ / <alpha-value> ]? ] | [ <hue>, <percentage>, <percentage>, <alpha-value>? ] )where
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>
Example
HTML
<p>My outline is blue, as you can see.</p>
CSS
p {
outline: 2px solid; /* Set the outline width and style */
outline-color: #0000FF; /* Make the outline blue */
margin: 5px;
}
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 | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 1.0 | (Yes) | 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 | Edge | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | (Yes) | ? | ? | ? | ? |
[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.