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outline-color

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. 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.

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

/* Keyword value */
outline-color: invert;

/* 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; if they don't, this keyword is considered 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 Internet Explorer Opera Safari

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	1	Yes	1.5 1 —? -moz-	8	7	1.2
`invert`	No	?	Yes — 3	8	7 — 15	No

Basic support

Yes

1.5

1 —? -moz-

1.2

invert No ? Yes — 3 8 7 — 15 No

Feature	Android webview	Chrome for Android	Edge mobile	Firefox for Android	IE mobile	Opera Android	iOS Safari
Basic support	?	?	Yes	?	?	?	?
`invert`	?	?	?	?	?	?	?