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border-inline-start-color

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The border-inline-start-color CSS property defines the color of the logical inline start border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation. It corresponds to the border-top-color, border-right-color, border-bottom-color, or border-left-color property depending on the values defined for writing-mode, direction, and text-orientation.

border-inline-start-color: red;
border-inline-start-color: #ee4141;

Related properties are border-block-start-color, border-block-end-color, and border-inline-end-color, which define the other border colors of the element.

Initial value currentcolor
Applies to all elements
Inherited no
Media visual
Computed value computed color
Animation type discrete
Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

Values

<'color'>
The color of the border. See color.

Formal syntax

<'color'>

where
<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 Content

<div>
  <p class="exampleText">Example text</p>
</div>

CSS Content

div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}

.exampleText {
  writing-mode: vertical-lr;
  border: 10px solid blue;
  border-inline-start-color: red;
}

Specification

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support No ?

41

381 2

383

No No No
Feature Android webview Chrome for Android Edge mobile Firefox for Android IE mobile Opera Android iOS Safari
Basic support No ? ?

41

381 2

383

No No No

1. Enabled by default since Firefox 41.

2. From version 38: this feature is behind the layout.css.vertical-text.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.

3. Supported as -moz-border-start-color.

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/border-inline-start-color