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CSS Data Type - <hue>
The CSS data type <hue> is used to describe the hue angle of a color. The color functions that accept hue as a single value, uses this data type. Some of these functions are: hsl(), hwb(), lch(), and oklch().
The different colors are red at 0deg, yellow at 60deg, lime at 120deg, cyan at 180deg, blue at 240deg and magenta at 300deg
Possible values
The data type <hue> can have one of the values:
<angle>: Specifies an angle value expressed in deg, grad, rad or turn respectively.
<number>: Specifies a number, representing degrees of the hue angle.
Since an <angle> is periodic, the value of <hue> gets normalized to the range [0deg, 360deg], such that, 480deg is same as 120deg, -120deg is same as 240deg, -1turn is same as 1turn, and so on.
Syntax
<hue> = <angle> | <number>
Note: Based on the color space, the angles correspond to a particular hue. For instance, the hue angle of sRGB green is 120deg in the sRGB color space, but in CIELAB color space it is 134.39deg.
CSS <hue> - Hues in different color spaces
The following example demonstrates the use of <hue> data type in different color spaces:
<html> <head> <style> div { width: 100px; height: 100px; border: 2px solid black; padding: 5px; display: inline-block; } .hsl { background-color:hsl(50 100% 50%); } .hwb { background-color: hwb(50 0% 0%); } .oklch { background-color: oklch(0.9 0.2 3); } .lch { background-color: lch(80 150 20); } </style> </head> <body> <div class="hsl">hsl</div> <div class="hwb">hwb</div> <div class="oklch">oklch</div> <div class="lch">lch</div> </body> </html>
CSS <hue> - Changing Hue Of A Color
The following example demonstrates the use of <hue> data type where hue of a color is changing with varying degrees:
<html> <head> <style> div { width: 80px; height: 80px; border: 2px solid black; padding: 5px; display: inline-block; } .hsl-0 { background-color:hsl(0 100% 50%); } .hsl-30 { background-color:hsl(30 100% 50%); } .hsl-60 { background-color:hsl(60 100% 50%); } .hsl-90 { background-color:hsl(90 100% 50%); } .hsl-180 { background-color:hsl(180 100% 50%); } .hsl-200 { background-color:hsl(200 100% 50%); } .hsl-270 { background-color:hsl(270 100% 50%); } .hsl-360 { background-color:hsl(360 100% 50%); } </style> </head> <body> <div class="hsl-0">hsl-0deg</div> <div class="hsl-30">hsl-30deg</div> <div class="hsl-60">hsl-60deg</div> <div class="hsl-90">hsl-90deg</div> <div class="hsl-180">hsl-180deg</div> <div class="hsl-200">hsl-200deg</div> <div class="hsl-270">hsl-270deg</div> <div class="hsl-360">hsl-360deg</div> </body> </html>
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