border-bottom-color

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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.

Try it

border-bottom-color: red;

border-bottom-color: #32a1ce;

border-bottom-color: rgb(170, 50, 220, 0.6);

border-bottom-color: hsl(60, 90%, 50%, 0.8);

border-bottom-color: transparent;

<section class="default-example" id="default-example">
  <div class="transition-all" id="example-element">
    This is a box with a border around it.
  </div>
</section>

#example-element {
  background-color: #eee;
  color: #000;
  border: 0.75em solid;
  padding: 0.75em;
  width: 80%;
  height: 100px;
}

Syntax

/* <color> values */
border-bottom-color: red;
border-bottom-color: #ffbb00;
border-bottom-color: rgb(255 0 0);
border-bottom-color: hsl(100deg 50% 25% / 75%);
border-bottom-color: currentcolor;
border-bottom-color: transparent;

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

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

Values

<color>: The color of the bottom border.

Formal definition

Initial value	`currentcolor`
Applies to	all elements. It also applies to `::first-letter`.
Inherited	no
Computed value	computed color
Animation type	a color

Formal syntax

border-bottom-color = 
  <color>     |
  <image-1D>  

<image-1D> = 
  <stripes()>  

<stripes()> = 
  stripes( <color-stripe># )  

<color-stripe> = 
  <color>                            &&
  [ <length-percentage> | <flex> ]?  

<length-percentage> = 
  <length>      |
  <percentage>

Examples

A div with a border

HTML

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

CSS

.my-box {
  border: solid 0.3em gold;
  border-bottom-color: red;
  width: auto;
}

.red-text {
  color: red;
}

Result

Specifications

Specification
CSS Backgrounds and Borders Module Level 3 # border-color

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android
`border-bottom-color`	1	12	1	3.5	1	18	4	10.1	1	1.0	4.4