code: function rgbToHex(rgb) {
  
      function componentToHex(c) {
        var hex = c.toString(16).toUpperCase();
        return hex.length === 1 ? "0" + hex : hex;
      }
  
      var color = rgb.map(function(component) {
        return componentToHex(parseInt(component * 255));
      });
  
      color.unshift("0X");
      color = color.join("");
      return parseInt(color);
  
    }
docs: Converts decimal values in the range 0-1 to hexadecimal values between 00 and FF.
  @param {Array} rgb: An array of three values, representing red, green and blue values.