Web/CSS/border-block-color

The border-block-color CSS property defines the color of the logical block borders 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 and border-bottom-color, or border-right-color and border-left-color property depending on the values defined for writing-mode, direction, and text-orientation.

border-block-color: yellow;
border-block-color: #F5F6F7;

The border color in the other dimension can be set with border-inline-color which sets border-inline-start-color, and border-inline-end-color.

Syntax

Values

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

Formal definition

Initial value	`currentcolor`
Applies to	all elements
Inherited	no
Computed value	computed color
Animation type	discrete

Formal syntax

<'border-top-color'>{1,2}

Examples

Border with vertical text

HTML

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

CSS

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

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

Results

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`border-block-color`	Chrome Full support 69 Disabled' Full support 69 Disabled' Disabled' From version 69: this feature is behind the `Experimental Web Platform Features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Edge Full support 79 Disabled' Full support 79 Disabled' Disabled' From version 79: this feature is behind the `Experimental Web Platform Features` preference (needs to be set to `enabled`).	Firefox Full support 66	IE No support No	Opera Full support 56 Disabled' Full support 56 Disabled' Disabled' From version 56: this feature is behind the `Experimental Web Platform Features` preference (needs to be set to `enabled`).	Safari No support No	WebView Android No support No	Chrome Android Full support 69 Disabled' Full support 69 Disabled' Disabled' From version 69: this feature is behind the `Experimental Web Platform Features` preference (needs to be set to `enabled`). To change preferences in Chrome, visit chrome://flags.	Firefox Android Full support 66	Opera Android Full support 48 Disabled' Full support 48 Disabled' Disabled' From version 48: this feature is behind the `Experimental Web Platform Features` preference (needs to be set to `enabled`).	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support: Full support
No support: No support
User must explicitly enable this feature.': User must explicitly enable this feature.