The border-bottom-color CSS property sets the color of an element's bottom border. It can also be set with the shorthand CSS properties border-color or border-bottom.


/* <color> values */
border-bottom-color: red;
border-bottom-color: #ffbb00;
border-bottom-color: rgb(255, 0, 0);
border-bottom-color: hsla(100%, 50%, 25%, 0.75);
border-bottom-color: currentcolor;
border-bottom-color: transparent;

/* Global values */
border-bottom-color: inherit;
border-bottom-color: initial;
border-bottom-color: unset;

The border-bottom-color property is specified as a single value.


The color of the bottom border.

Formal definition

Initial valuecurrentcolor
Applies toall elements. It also applies to ::first-letter.
Computed valuecomputed color
Animation typea color

Formal syntax



A simple div with a border


<div class="mybox">
  <p>This is a box with a border around it.
     Note which side of the box is
     <span class="redtext">red</span>.</p>


.mybox {
    border: solid 0.3em gold;
    border-bottom-color: red;
    width: auto;

.redtext {
    color: red;



Specification Status Comment
CSS Backgrounds and Borders Module Level 3
The definition of 'border-bottom-color' in that specification.
Candidate Recommendation No significant changes, though the transparent keyword, now included in <color> which has been extended, has been formally removed.
CSS Level 2 (Revision 1)
The definition of 'border-bottom-color' in that specification.
Recommendation Initial definition

Browser compatibility

BCD tables only load in the browser

See also