<hex-color>

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.

The <hex-color> CSS data type is a notation for describing the hexadecimal color syntax of an sRGB color using its primary color components (red, green, blue) written as hexadecimal numbers, as well as its transparency.

A <hex-color> value can be used everywhere where a <color> can be used.

Syntax

#RGB        // The three-value syntax
#RGBA       // The four-value syntax
#RRGGBB     // The six-value syntax
#RRGGBBAA   // The eight-value syntax

Value

R or RR

The red component of the color, as a case-insensitive hexadecimal number between 0 and ff (255). If there is only one number, it is duplicated: 1 means 11.

G or GG

The green component of the color, as a case-insensitive hexadecimal number between 0 and ff (255). If there is only one number, it is duplicated: c means cc.

B or BB

The blue component of the color, as a case-insensitive hexadecimal number between 0 and ff (255). If there is only one number, it is duplicated: 9 means 99.

A or AA Optional

The alpha component of the color, indicating its transparency, as a case-insensitive hexadecimal number between 0 and ff (255). If there is only one number, it is duplicated: e means ee. 0, or 00, represents a fully transparent color, and f, or ff, a fully opaque one.

Note: The syntax is case-insensitive: #00ff00 is the same as #00FF00.

Examples

Hexadecimal hot pink

This example includes four hot pink squares, with fully opaque or semi-transparent backgrounds created using four different-length case-insensitive hex-color syntaxes.

HTML

html
<div>
  #F09
  <div class="c1"></div>
</div>
<div>
  #f09a
  <div class="c2"></div>
</div>
<div>
  #ff0099
  <div class="c3"></div>
</div>
<div>
  #FF0099AA
  <div class="c4"></div>
</div>

CSS

The hot pink background colors are created using the three-, four-, six-, and eight-value hex notations, using both uppercase and lowercase letters.

css
[class] {
  width: 40px;
  height: 40px;
}
.c1 {
  background: #f09;
}
.c2 {
  background: #f09a;
}
.c3 {
  background: #ff0099;
}
.c4 {
  background: #ff0099aa;
}

Result

Specifications

Specification
CSS Color Module Level 4
# hex-notation

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
RGB hexadecimal notation (#RRGGBB, #RGB, …)
RGBA hexadecimal notation (#RRGGBBAA, #RGBA)

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also