anchor.diff:    // means the color, brightness and darkness sliders.
     void _colorChanged(ColorData stop) {
       color = stop.color;
  -    colorLocation = stop.colorLocation;
  +    _colorLocation = stop.colorLocation;
       
       _brightnessSlider.backgroundStyle = "linear-gradient(to right, ${color.toString()}, #ffffff)";
       
  
positive.code:   
    // Three main control colors.
    ColorValue color;
    double colorLocation = 0.5;
    
    ColorValue bright;
    double brightLocation = 0.5;
    
    ColorValue dark;
    double darkLocation = 0.5;
    
    // Color box
    ColorValue colorBoxValue = new ColorValue();
  
negative.code:     
      if (_colorChangeCallback != null && _transmit) {
        ColorData stop = new ColorData();
        stop.colorLocation = _colorLocation;
        stop.displayColor = colorBoxValue;
        stop.color = color;
        stop.whiteness = bright;
  