hsl()
The hsl() functional notation expresses an sRGB color according to its hue, saturation, and lightness components. An optional alpha component represents the color's transparency.
Try it

 Defining complementary colors with hsl() can be done with a single formula, as they are positioned on the same diameter of the color wheel. If theta is the angle of a color, its complementary one will have 180deg-theta as its hue coordinate.
Syntax
/* Syntax with space-separated values */
hsl(hue saturation lightness)
hsl(hue saturation lightness / alpha)

/* Syntax with comma-separated values */
hsl(hue, saturation, lightness)
hsl(hue, saturation, lightness, alpha)
Values
 hue  An <angle> of the color wheel given in one of the following units: deg, rad, grad, or turn. When written as a unitless <number>, it is interpreted as degrees. By definition, red is 0deg, with the other colors spread around the circle, so green is 120deg, blue is 240deg, etc. As an <angle> is periodic, it implicitly wraps around such that -120deg = 240deg, 480deg = 120deg, -1turn = 1turn, and so on. This color wheel helps finding the angle associated with a color:    saturation  A <percentage> where 100% is completely saturated, while 0% is completely unsaturated (gray).  lightness  A <percentage> where 100% is white, 0% is black, and 50% is "normal".  
alpha Optional
  A <percentage> or a <number> between 0 and 1, where the number 1 corresponds to 100% and means full opacity, while 0 corresponds to 0% and means fully transparent.  Examples

The hsl() function works well with conic-gradient() as both deal with angles. div {
  width: 100px;
  height: 100px;
  background: conic-gradient(
    hsl(360, 100%, 50%),
    hsl(315, 100%, 50%),
    hsl(270, 100%, 50%),
    hsl(225, 100%, 50%),
    hsl(180, 100%, 50%),
    hsl(135, 100%, 50%),
    hsl(90, 100%, 50%),
    hsl(45, 100%, 50%),
    hsl(0, 100%, 50%)
  );
  clip-path: circle(closest-side);
}


Specifications

Specification
CSS Color Module Level 4 # the-hsl-notation

Browser compatibility




Desktop
Mobile



Chrome
Edge
Firefox
Internet Explorer
Opera
Safari
WebView Android
Chrome Android
Firefox for Android
Opera Android
Safari on IOS
Samsung Internet




hsl
1
12
1
9
9.5
3.1
≤37
18
4
10.1
2
1.0


alpha_parameter
65
79
52
No
52
12.1
65
65
52
47
12.2
9.0


space_separated_parameters
65
79
52
No
52
12.1
65
65
52
47
12.2
9.0



See also
 The function hsla(), an historical alias for this function. The <color> type that represents any color. HSL Color Picker 

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Last modified: Jul 30, 2022, by MDN contributors


    
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