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CSS Reference

CSS Reference CSS Selectors CSS Reference Aural CSS Web Safe Fonts CSS Units CSS Colors CSS Color Values CSS Color Names CSS Color HEX CSS3 Browser Support

CSS Properties

align-content align-items align-self animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function backface-visibility background background-attachment background-clip background-color background-image background-origin background-position background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-shadow box-sizing caption-side clear clip color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset cursor direction display empty-cells flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-size font-size-adjust font-stretch font-style font-variant font-weight hanging-punctuation height icon justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-bottom margin-left margin-right margin-top max-height max-width @media min-height min-width nav-down nav-index nav-left nav-right nav-up opacity order outline outline-color outline-offset outline-style outline-width overflow overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top page-break-after page-break-before page-break-inside perspective perspective-origin position quotes resize right tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-indent text-justify text-overflow text-shadow text-transform top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function unicode-bidi vertical-align visibility white-space width word-break word-spacing word-wrap z-index

CSS Legal Color Values


CSS Colors

Colors in CSS can be specified by the following methods:

  • Hexadecimal colors
  • RGB colors
  • RGBA colors
  • HSL colors
  • HSLA colors
  • Predefined/Cross-browser color names

Hexadecimal Colors

Hexadecimal color values are supported in all major browsers.

A hexadecimal color is specified with: #RRGGBB, where the RR (red), GG (green) and BB (blue) hexadecimal integers specify the components of the color. All values must be between 0 and FF.

For example, the #0000ff value is rendered as blue, because the blue component is set to its highest value (ff) and the others are set to 0.

Example

Define different HEX colors:

#p1 {background-color: #ff0000;} / * red */
#p2 {background-color: #00ff00;} / * green */
#p3 {background-color: #0000ff;} / * blue */

Try it yourself »


RGB Colors

RGB color values are supported in all major browsers.

An RGB color value is specified with: rgb(red, green, blue). Each parameter (red, green, and blue) defines the intensity of the color and can be an integer between 0 and 255 or a percentage value (from 0% to 100%).

For example, the rgb(0,0,255) value is rendered as blue, because the blue parameter is set to its highest value (255) and the others are set to 0.

Also, the following values define equal color: rgb(0,0,255) and rgb(0%,0%,100%).

Example

Define different RGB colors:

#p1 {background-color: rgb(255,0,0);} / * red */
#p2 {background-color: rgb(0,255,0);} / * green */
#p3 {background-color: rgb(0,0,255);} / * blue */

Try it yourself »


RGBA Colors

RGBA color values are supported in IE9+, Firefox 3+, Chrome, Safari, and in Opera 10+.

RGBA color values are an extension of RGB color values with an alpha channel - which specifies the opacity of the object.

An RGBA color value is specified with: rgba(red, green, blue, alpha). The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque).

Example

Define different RGB colors with opacity:

#p1 {background-color: rgba(255,0,0,0.3);} / * red with opacity */
#p2 {background-color: rgba(0,255,0,0.3);} / * green with opacity */
#p3 {background-color: rgba(0,0,255,0.3);} / * blue with opacity */

Try it yourself »


HSL Colors

HSL color values are supported in IE9+, Firefox, Chrome, Safari, and in Opera 10+.

HSL stands for hue, saturation, and lightness - and represents a cylindrical-coordinate representation of colors.

An HSL color value is specified with: hsl(hue, saturation, lightness).

Hue is a degree on the color wheel (from 0 to 360) - 0 (or 360) is red, 120 is green, 240 is blue. Saturation is a percentage value; 0% means a shade of gray and 100% is the full color. Lightness is also a percentage; 0% is black, 100% is white.

Example

Define different HSL colors:

#p1 {background-color: hsl(120,100%,50%);} / * green */
#p2 {background-color: hsl(120,100%,75%);} / * light green */
#p3 {background-color: hsl(120,100%,25%);} / * dark green */
#p4 {background-color: hsl(120,60%,70%);} / * pastel green */

Try it yourself »


HSLA Colors

HSLA color values are supported in IE9+, Firefox 3+, Chrome, Safari, and in Opera 10+.

HSLA color values are an extension of HSL color values with an alpha channel - which specifies the opacity of the object.

An HSLA color value is specified with: hsla(hue, saturation, lightness, alpha), where the alpha parameter defines the opacity. The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (fully opaque).

Example

Define different HSL colors with opacity:

#p1 {background-color: hsla(120,100%,50%,0.3);} / * green with opacity */
#p2 {background-color: hsla(120,100%,75%,0.3);} / * light green with opacity */
#p3 {background-color: hsla(120,100%,25%,0.3);} / * dark green with opacity */
#p4 {background-color: hsla(120,60%,70%,0.3);} / * pastel green with opacity */

Try it yourself »


Predefined/Cross-browser Color Names

140 color names are predefined in the HTML and CSS color specification. Look at our table of predefined color names.



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