CSS Colors

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

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Colors in CSS are most often specified by:

• a valid color name - like "red"
• an RGB value - like "rgb(255, 0, 0)"
• a HEX value - like "#ff0000"

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Color Names

Colors set by using color names:

Example

Color	Name
	Red
	Green
	Blue
	Orange
	Yellow
	Cyan
	Black

Note: Color names are case-insensitive: "Red" is the same as "red" or "RED".

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RGB (Red, Green, Blue)

RGB color values can be specified using this formula: rgb(red, green, blue).

Each parameter (red, green, blue) defines the intensity of the color between 0 and 255.

For example, rgb(255,0,0) is displayed as red, because red is set to its highest value (255) and the others are set to 0. Experiment by mixing the RGB values below:

Red	Green	Blue
255	0	0

rgb(255, 0, 0)

Example

Color	RGB
	rgb(255,0,0)
	rgb(0,255,0)
	rgb(0,0,255)
	rgb(255,165,0)
	rgb(255,255,0)
	rgb(0,255,255)

Shades of grey are often defined using equal values for all the 3 light sources:

Example

Color	RGB
	rgb(0,0,0)
	rgb(128,128,128)
	rgb(255,255,255)

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Hexadecimal Colors

RGB values can also be specified using hexadecimal color values in the form: #RRGGBB, where RR (red), GG (green) and BB (blue) are hexadecimal values between 00 and FF (same as decimal 0-255).

For example, #FF0000 is displayed as red, because red is set to its highest value (FF) and the others are set to the lowest value (00). Note: HEX values are case-insensitive: "#ff0000" is the same as "FF0000".

Example

Color	HEX
	#FF0000
	#00FF00
	#0000FF
	#FFA500
	#FFFF00
	#00FFFF

Shades of grey are often defined using equal values for all the 3 light sources:

Example

Color	HEX
	#000000
	#808080
	#FFFFFF