HTML Colors
HTML colors are specified with predefined color names, or with RGB, HEX, HSL, RGBA, or HSLA values.
Color Names
In HTML, a color can be specified by using a color name:
HTML supports 140 standard color names.
Background Color
You can set the background color for HTML elements:
Example
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<h1 style="background-color:DodgerBlue;">Hello World</h1><p style="background-color:Tomato;">Lorem ipsum...</p>
Text Color
You can set the color of text:
Hello World
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat.
Ut wisi enim ad minim veniam, quis nostrud exerci tation ullamcorper suscipit lobortis nisl ut aliquip ex ea commodo consequat.
Example
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<h1 style="color:Tomato;">Hello World</h1><p style="color:DodgerBlue;">Lorem ipsum...</p><p style="color:MediumSeaGreen;">Ut wisi enim...</p>
You can set the color of borders:
Hello World
Hello World
Hello World
Example
123
<h1 style="border:2px solid Tomato;">Hello World</h1><h1 style="border:2px solid DodgerBlue;">Hello World</h1><h1 style="border:2px solid Violet;">Hello World</h1>
Color Values
In HTML, colors can also be specified using RGB values, HEX values, HSL values, RGBA values, and HSLA values.
The following three <div> elements have their background color set with RGB, HEX, and HSL values:
The following two <div> elements have their background color set with RGBA and HSLA values, which adds an Alpha channel to the color (here we have 50% transparency):
Example
123456
<h1 style="background-color:rgb(255, 99, 71);">...</h1><h1 style="background-color:#ff6347;">...</h1><h1 style="background-color:hsl(9, 100%, 64%);">...</h1> <h1 style="background-color:rgba(255, 99, 71, 0.5);">...</h1><h1 style="background-color:hsla(9, 100%, 64%, 0.5);">...</h1>
HTML RGB and RGBA Colors
An RGB color value represents RED, GREEN, and BLUE light sources.
An RGBA color value is an extension of RGB with an Alpha channel (opacity).
RGB Color Values
In HTML, a color can be specified as an RGB value, using this formula:
rgb(red, green, blue)
Each parameter (red, green, and blue) defines the intensity of the color with a value between 0 and 255.
This means that there are 256 x 256 x 256 = 16777216 possible colors!
For example, rgb(255, 0, 0) is displayed as red, because red is set to its highest value (255), and the other two (green and blue) are set to 0.
Another example, rgb(0, 255, 0) is displayed as green, because green is set to its highest value (255), and the other two (red and blue) are set to 0.
To display black, set all color parameters to 0, like this: rgb(0, 0, 0).
To display white, set all color parameters to 255, like this: rgb(255, 255, 255).
Experiment by mixing the RGB values below:
rgb(255, 99, 71)
RED
GREEN
BLUE
Example
Shades of Gray
Shades of gray are often defined using equal values for all three parameters:
Example
RGBA Color Values
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 (not transparent at all):
Experiment by mixing the RGBA values below:
rgba(255, 99, 71, 0.5)
RED
GREEN
BLUE
ALPHA
Example
HTML HEX Colors
A hexadecimal color is specified with: #RRGGBB, where the RR (red), GG (green) and BB (blue) hexadecimal integers specify the components of the color.
HEX Color Values
In HTML, a color can be specified using a hexadecimal value 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 other two (green and blue) are set to 00.
Another example, #00ff00 is displayed as green, because green is set to its highest value (ff), and the other two (red and blue) are set to 00.
To display black, set all color parameters to 00, like this: #000000.
To display white, set all color parameters to ff, like this: #ffffff.
Experiment by mixing the HEX values below:
#ff6347
RED
GREEN
BLUE
Shades of gray are often defined using equal values for all three parameters:
HTML HSL and HSLA Colors
HSL stands for hue, saturation, and lightness.
HSLA color values are an extension of HSL with an Alpha channel (opacity).
HSL Color Values
In HTML, a color can be specified using hue, saturation, and lightness (HSL) in the form:
hsl(hue, saturation, lightness)
Hue is a degree on the color wheel from 0 to 360. 0 is red, 120 is green, and 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 value, 0% is black, and 100% is white.
Experiment by mixing the HSL values below:
hsl(0, 100%, 50%)
HUE
SATURATION
LIGHTNESS
Example
Saturation
Saturation can be described as the intensity of a color.
100% is pure color, no shades of gray
50% is 50% gray, but you can still see the color.
0% is completely gray, you can no longer see the color.
Example
The lightness of a color can be described as how much light you want to give the color, where 0% means no light (black), 50% means 50% light (neither dark nor light) 100% means full lightness (white).
Example
Shades of Gray
Shades of gray are often defined by setting the hue and saturation to 0, and adjust the lightness from 0% to 100% to get darker/lighter shades:
Example
HSLA Color Values
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)
The alpha parameter is a number between 0.0 (fully transparent) and 1.0 (not transparent at all):
Experiment by mixing the HSLA values below:
hsla(0, 100%, 50%, 0.5)
HUE
SATURATION
LIGHTNESS
ALPHA
