JAVASCRIPT

angular chart js graph legend colors

angular.forEach($scope.data , function (dataItem, index) {
      var colorCode = getColorHex(index);
      $scope.colours.push(colorCode);
  });

  var getColorHex = function (i) {
      //skip black & white
      i+=2;

      var colorDecimal = getRGB(i);
      var colorHex = decimalColorToHTMLcolor(colorDecimal);
      return colorHex;
  }

  function decimalColorToHTMLcolor(colorDecimal) {
      var intnumber = colorDecimal - 0;
      var red, green, blue;
      var template = "#000000";

      red = (intnumber & 0x0000ff) << 16;
      green = intnumber & 0x00ff00;
      blue = (intnumber & 0xff0000) >>> 16;

      intnumber = red | green | blue;
      var HTMLcolor = intnumber.toString(16);
      HTMLcolor = template.substring(0, 7 - HTMLcolor.length) + HTMLcolor;

      return HTMLcolor;
  }

  function getRGB(index) {
      var p = getPattern(index);
      return getElement(p[0]) << 16 | getElement(p[1]) << 8 | getElement(p[2]);
  }