The border-block-start-color CSS property defines the color of the logical block-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-block-start-color: blue; border-block-start-color: #4c5d21;  /* Global values */ border-block-start-color: inherit; border-block-start-color: initial; border-block-start-color: revert; border-block-start-color: unset; 

border-block-start-color

The border-block-start-color CSS property defines the color of the logical block-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-block-start-color: blue; border-block-start-color: #4c5d21;  /* Global values */ border-block-start-color: inherit; border-block-start-color: initial; border-block-start-color: revert; border-block-start-color: unset; 

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

Values

<'color'>

See border-color

Formal definition

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

Formal syntax

<'border-top-color'>

Examples

Border color 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-start-color: red; } 

Results

Specifications

Specification
CSS Logical Properties and Values Level 1 # border-color

See also

This property maps to one of the physical border properties: border-top-color, border-right-color, border-bottom-color, or border-left-color. writing-mode, direction, text-orientation Select your preferred language English (US)EspañolFrançais日本語 Change language