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Similar to hsl() notation, but with an added alpha (opacity) value.


hsla(<hue>, <saturation>%, <lightness>%, <alpha>)

value Description
<hue> specified in degrees around the color wheel (without units), where 0° is red, 60° is yellow, 120° is green, 180° is cyan, 240° is blue, 300° is magenta, and 360° is red
<saturation> specified in percentage where 0% is fully desaturated (grayscale) and 100% is fully saturated (vividly colored)
<lightness> specified in percentage where 0% is fully black and 100% is fully white
<alpha> a number from 0 - 1 where 0 is fully transparent and 1 is fully opaque


hsla(240, 100%, 50%, 0) /* transparent */

hsla(240, 100%, 50%, 0.5) /* half-translucent blue */

hsla(240, 100%, 50%, 1) /* fully opaque blue */


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