Tutorials References Menu
HTML CSS JAVASCRIPT SQL PYTHON PHP BOOTSTRAP HOW TO W3.CSS JAVA JQUERY C++ C# R

CSS Tutorial

CSS HOME CSS Introduction CSS Syntax CSS Selectors CSS How To CSS Comments CSS Colors
Colors RGB HEX HSL
CSS Backgrounds
Background Color Background Image Background Repeat Background Attachment Background Shorthand
CSS Borders
Borders Border Width Border Color Border Sides Border Shorthand Rounded Borders
CSS Margins
Margins Margin Collapse
CSS Padding CSS Height/Width CSS Box Model CSS Outline
Outline Outline Width Outline Color Outline Shorthand Outline Offset
CSS Text
Text Color Text Alignment Text Decoration Text Transformation Text Spacing Text Shadow
CSS Fonts
Font Family Font Web Safe Font Fallbacks Font Style Font Size Font Google Font Pairings Font Shorthand
CSS Icons CSS Links CSS Lists CSS Tables
Table Borders Table Size Table Alignment Table Style Table Responsive
CSS Display CSS Max-width CSS Position CSS Overflow CSS Float
Float Clear Float Examples
CSS Inline-block CSS Align CSS Combinators CSS Pseudo-class CSS Pseudo-element CSS Opacity CSS Navigation Bar
Navbar Vertical Navbar Horizontal Navbar
CSS Dropdowns CSS Image Gallery CSS Image Sprites CSS Attr Selectors CSS Forms CSS Counters CSS Website Layout CSS Units CSS Specificity CSS !important

CSS Advanced

CSS Rounded Corners CSS Border Images CSS Backgrounds CSS Colors CSS Color Keywords CSS Gradients
Linear Gradients Radial Gradients
CSS Shadows
Shadow Effects Box Shadow
CSS Text Effects CSS Web Fonts CSS 2D Transforms CSS 3D Transforms CSS Transitions CSS Animations CSS Tooltips CSS Style Images CSS Image Reflection CSS object-fit CSS object-position CSS Buttons CSS Pagination CSS Multiple Columns CSS User Interface CSS Variables
The var() Function Overriding Variables Variables and JavaScript Variables in Media Queries
CSS Box Sizing CSS Media Queries CSS MQ Examples CSS Flexbox
CSS Flexbox CSS Flex Container CSS Flex Items CSS Flex Responsive

CSS Responsive

RWD Intro RWD Viewport RWD Grid View RWD Media Queries RWD Images RWD Videos RWD Frameworks RWD Templates

CSS Grid

Grid Intro Grid Container Grid Item

CSS SASS

SASS Tutorial

CSS Examples

CSS Templates CSS Examples

CSS References

CSS Reference CSS Selectors CSS Functions CSS Reference Aural CSS Web Safe Fonts CSS Animatable CSS Units CSS PX-EM Converter CSS Colors CSS Color Values CSS Default Values CSS Browser Support

CSS Colors

❮ Previous Next ❯

CSS supports 140+ color names, HEX values, RGB values, RGBA values, HSL values, HSLA values, and opacity.

RGBA Colors

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

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).

rgba(255, 0, 0, 0.2);
rgba(255, 0, 0, 0.4);
rgba(255, 0, 0, 0.6);
rgba(255, 0, 0, 0.8);

The following example defines different RGBA colors:

Example

#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 stands for Hue, Saturation and Lightness.

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

  1. Hue is a degree on the color wheel (from 0 to 360):
    • 0 (or 360) is red
    • 120 is green
    • 240 is blue
  2. Saturation is a percentage value: 100% is the full color.
  3. Lightness is also a percentage; 0% is dark (black) and 100% is white.
hsl(0, 100%, 30%);
hsl(0, 100%, 50%);
hsl(0, 100%, 70%);
hsl(0, 100%, 90%);

The following example defines different HSL colors:

Example

#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 an extension of HSL color values with an alpha channel - which specifies the opacity for a color.

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).

hsla(0, 100%, 30%, 0.3);
hsla(0, 100%, 50%, 0.3);
hsla(0, 100%, 70%, 0.3);
hsla(0, 100%, 90%, 0.3);

The following example defines different HSLA colors:

Example

#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 »

Opacity

The CSS opacity property sets the opacity for the whole element (both background color and text will be opaque/transparent).

The opacity property value must be a number between 0.0 (fully transparent) and 1.0 (fully opaque).

rgb(255, 0, 0);opacity:0.2;
rgb(255, 0, 0);opacity:0.4;
rgb(255, 0, 0);opacity:0.6;
rgb(255, 0, 0);opacity:0.8;

Notice that the text above will also be transparent/opaque!

The following example shows different elements with opacity:

Example

#p1 {background-color:rgb(255,0,0);opacity:0.6;}  /* red with opacity */
#p2 {background-color:rgb(0,255,0);opacity:0.6;}  /* green with opacity */
#p3 {background-color:rgb(0,0,255);opacity:0.6;}  /* blue with opacity */
Try it Yourself »

❮ Previous Next ❯