border-bottom-color

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

Syntax

/* <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: 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 valuecurrentcolor
Applies toall elements. It also applies to ::first-letter.
Inheritedno
Computed valuecomputed color
Animation typea color

Formal syntax

border-bottom-color = 
<color>

<color> =
<absolute-color-base> |
currentcolor |
<system-color>

<absolute-color-base> =
<hex-color> |
<absolute-color-function> |
<named-color> |
transparent

<absolute-color-function> =
<rgb()> |
<rgba()> |
<hsl()> |
<hsla()> |
<hwb()> |
<lab()> |
<lch()> |
<oklab()> |
<oklch()> |
<color()>

<rgb()> =
rgb( [ <percentage> | none ]{3} [ / [ <alpha-value> | none ] ]? ) |
rgb( [ <number> | none ]{3} [ / [ <alpha-value> | none ] ]? )

<hsl()> =
hsl( [ <hue> | none ] [ <percentage> | none ] [ <percentage> | none ] [ / [ <alpha-value> | none ] ]? )

<hwb()> =
hwb( [ <hue> | none ] [ <percentage> | none ] [ <percentage> | none ] [ / [ <alpha-value> | none ] ]? )

<lab()> =
lab( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ / [ <alpha-value> | none ] ]? )

<lch()> =
lch( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <hue> | none ] [ / [ <alpha-value> | none ] ]? )

<oklab()> =
oklab( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ / [ <alpha-value> | none ] ]? )

<oklch()> =
oklch( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <hue> | none ] [ / [ <alpha-value> | none ] ]? )

<color()> =
color( <colorspace-params> [ / [ <alpha-value> | none ] ]? )

<alpha-value> =
<number> |
<percentage>

<hue> =
<number> |
<angle> |
none

<colorspace-params> =
<predefined-rgb-params> |
<xyz-params>

<predefined-rgb-params> =
<predefined-rgb> [ <number> | <percentage> | none ]{3}

<xyz-params> =
<xyz-space> [ <number> | none ]{3}

<predefined-rgb> =
srgb |
srgb-linear |
display-p3 |
a98-rgb |
prophoto-rgb |
rec2020

<xyz-space> =
xyz |
xyz-d50 |
xyz-d65

Examples

A simple div with a border

HTML

<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>
</div>

CSS

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

.redtext {
    color: red;
}

Result

Specifications

Specification
CSS Backgrounds and Borders Module Level 4
# border-color

Browser compatibility

BCD tables only load in the browser

See also