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Colors Tutorial

Colors are displayed combining RED, GREEN, and BLUE light.


Color Names

With CSS, colors can be set by using color names:

Example

ColorName
 Red
 Yellow
 Cyan
 Blue
 Magenta
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CSS Color Values

With CSS, colors can be specified in different ways:

  • By color names
  • As RGB values
  • As hexadecimal values
  • As HSL values (CSS3)
  • As HWB values (CSS4)
  • With the currentcolor keyword

RGB Colors

RGB color values are supported in all browsers.

An RGB color value is specified with: rgb( RED , GREEN , BLUE ).

Each parameter defines the intensity of the color as an integer between 0 and 255.

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

Example

ColorRGBColor
 rgb(255,0,0)Red
 rgb(0,255,0)Green
 rgb(0,0,255)Blue
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Shades of gray are often defined using equal values for all the 3 light sources:

Example

ColorRGBColor
 rgb(0,0,0)Black
 rgb(128,128,128)Gray
 rgb(255,255,255)White
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Hexadecimal Colors

Hexadecimal color values are also supported in all browsers.

A hexadecimal color is specified with: #RRGGBB.

RR (red), GG (green) and BB (blue) are hexadecimal integers between 00 and FF specifying the intensity of the color.

For example, #0000FF is displayed as blue, because the blue component is set to its highest value (FF) and the others are set to 00.

Example

ColorHEXRGBColor
 #FF0000rgb(255,0,0)Red
 #00FF00rgb(0,255,0)Green
 #0000FFrgb(0,0,255)Blue
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Shades of gray are often defined using equal values for all the 3 light sources:

Example

ColorHEXRGBColor
 #000000rgb(0,0,0)Black
 #808080rgb(128,128,128)Gray
 #FFFFFFrgb(255,255,255)White
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Upper Case or Lower Case?

You can use upper case or lower case letters to specify hexadecimal values.

Lower case are easier to write. Upper case are easier to read.


Color Names

CSS supports 140 standard color names.

In the next chapter you will find a complete alphabetical list of color names with hexadecimal values:

Color NameHexColor
AliceBlue#F0F8FF 
AntiqueWhite#FAEBD7 
Aqua#00FFFF 
Aquamarine#7FFFD4 
Azure#F0FFFF 
Beige#F5F5DC 
Bisque#FFE4C4 

The currentcolor Keyword

The currentcolor keyword refers to the value of the color property of an element.

Example

The border color of the following <div> element will be blue, because the text color of the <div> element is blue:

#myDIV {
  color: blue; /* Blue text color */
  border: 10px solid currentcolor; /* Blue border color */
}
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