code: def from_hsl(h, s, l, alpha=1.0, wref=_DEFAULT_WREF):
      
      return Color((h, s, l), 'hsl', alpha, wref)
docs: Create a new instance based on the specifed HSL values.
  
      Parameters:
        :h:
          The Hue component value [0...1]
        :s:
          The Saturation component value [0...1]
        :l:
          The Lightness component value [0...1]
        :alpha:
          The color transparency [0...1], default is opaque
        :wref:
          The whitepoint reference, default is 2° D65.
  
      Returns:
        A grapefruit.Color instance.
  
      >>> Color.from_hsl(30, 1, 0.5)
      Color(1.0, 0.5, 0.0, 1.0)
      >>> Color.from_hsl(30, 1, 0.5, 0.5)
      Color(1.0, 0.5, 0.0, 0.5)