var colors = ['#226666', '#AA3939', '#AA6C39', '#2D882D'];

​

function getColor() {

  var max = 3;

  var min = 0;

  var colorKey = Math.floor(Math.random() * (max - min)) + min;

  console.log(colorKey);

  var color = colors[colorKey];

  return color;

}

​

function avatarGen(fst_name, lst_name) {

  var pfl_img = document.getElementById('pfl-img');

  var pfl_ini = document.getElementById('pfl-ini');

  pfl_img.style.backgroundColor = getColor();

  // Generate initials and insert DOM

  var initials = /^\w/;

  var fst_initial = initials.exec(fst_name);

  var lst_initial = initials.exec(lst_name);

  pfl_ini.innerHTML = fst_initial + lst_initial;

  return 0;

}

​

(function() {

  avatarGen("Ruan", "Aragão");

})();