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.

Try it

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

css

border-block-color: yellow;
border-block-color: #f5f6f7;

/* Global values */
border-block-color: inherit;
border-block-color: initial;
border-block-color: revert;
border-block-color: revert-layer;
border-block-color: unset;

Values

<color>

The color of the border.

Formal definition

Initial valuecurrentcolor
Applies toall elements
Inheritedno
Computed valuecomputed color
Animation typeby computed value type

Formal syntax

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

Examples

Border with vertical text

HTML

html

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

CSS

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
CSS Logical Properties and Values Level 1
# propdef-border-block-color

Browser compatibility

BCD tables only load in the browser

See also