hsl() function returns a color with the given hue, saturation, and lightness and the given alpha channel.
|$hue||Required||Specifies the degree to which a stimulus can be described as similar to or different from stimuli that are described as red, green, blue, and yellow. The hue is a number between 0deg and 360deg (both are inclusive).|
|$saturation||Required||Specifies the intensity of color. The saturation is the numbers between 0% and 100% (both are inclusive).|
|$lightness||Required||Specifies the tone of the color. The lightness is the numbers between 0% and 100% (both are inclusive).|
|color||Returns a color with the given hue, saturation, and lightness.|