code: function ( color ) {
              var hsla = {};
              color.replace( this.REG_HSL, function ( str, h, s, l, a ) {
                  hsla = {h: parseFloat(h), s: parseFloat(s), l: parseFloat(l), a: 1};
                  if ( a ) hsla.a = Number(a);
              });
              return hsla;
          }
docs: hsla(255, 0, 255, 0.5) -> Object{h, s, l, a} 로 반환
  @param	{String}	color		hsl(360, 90%, 10%) 나 hsla(360, 90%, 10%, 0.5) 형식 Color
  @return	{Object}	{h, s, l, a}