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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.

Syntax

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

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} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )
<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )
<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )
<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <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

Specification	Status	Comment
CSS Logical Properties and Values Level 1 The definition of 'border-inline-start-color' in that specification.	Editor's Draft	Initial definition

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	69	No	41 41 38 Disabled Enabled by default since Firefox 41. Disabled 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. 38 Uses the non-standard name: `-moz-border-start-color`	No	56	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	69	?	No	41 41 38 Disabled Enabled by default since Firefox 41. Disabled 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. 38 Uses the non-standard name: `-moz-border-start-color`	56	No	?