Function d3_Rgb

explainshell/web/static/js/d3.v3.js:1374–1378

(r, g, b)

    return new d3_Rgb(r, g, b);
  }
  function d3_Rgb(r, g, b) {
    this.r = r;
    this.g = g;
    this.b = b;
  }
  var d3_rgbPrototype = d3_Rgb.prototype = new d3_Color();
  d3_rgbPrototype.brighter = function(k) {
    k = Math.pow(.7, arguments.length ? k : 1);