// Darken the series by 50% to generate its regression.
var label = labels[i] + " Regression";
new_labels.push(label);
- var c = new RGBColor(orig_colors[i - 1]);
+ var c = new RGBColorParser(orig_colors[i - 1]);
c.r = Math.floor(255 - 0.5 * (255 - c.r));
c.g = Math.floor(255 - 0.5 * (255 - c.g));
c.b = Math.floor(255 - 0.5 * (255 - c.b));