Purpose:
Calculates a color value in the HSL color space (Hue, Saturation, Lightness)
Parameter:
Number Hue [0-360] (0°=red, 120°=green, 240°=blue)
Number Saturation [0-1]
Number Lightness [0-1] (0=no lightness, 1=full lightness)
Return value:
Number