code: function(newOffset) {
              this.logger.log("hue update: " + newOffset , "warn");
  
              var h        = this._getH(),
                  rgb      = Color.hsv2rgb(h, 1, 1),
                  styleDef = "rgb(" + rgb.join(",") + ")";
  
              this.set(this.OPT.HUE, h, true);
  
              // set picker background to the hue
              Dom.setStyle(this.getElement(this.ID.PICKER_BG), "background-color", styleDef);
  
              if (this.hueSlider.valueChangeSource !== Slider.SOURCE_SET_VALUE) {
                  this._getValuesFromSliders();
              }
  
              this._updateFormFields();
              this._updateSwatch();
          }
docs: Event handler for the hue slider.
  @method _onHueSliderChange
  @param newOffset {int} pixels from the start position
  @protected