The border-block-end-color CSS property defines the color of the logical block-end 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-end-color: yellow; border-block-end-color: #f5f6f7; /* Global values */ border-block-end-color: inherit; border-block-end-color: initial; border-block-end-color: revert; border-block-end-color: revert-layer; border-block-end-color: unset;
Related properties are border-block-start-color, border-inline-start-color, and border-inline-end-color, which define the other border colors of the element.
Values
<color>- 
    
The color of the border.
 
Formal definition
| Initial value | currentcolor | 
|---|---|
| Applies to | Same as border-top-color | 
| Inherited | no | 
| Computed value | Same as corresponding border-*-color properties | 
| Animation type | by computed value type | 
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-end-color: red;
}
See also
- CSS Logical Properties and Values
 - This property maps to one of the physical border properties: 
border-top-color,border-right-color,border-bottom-color, orborder-left-color. writing-mode,direction,text-orientation