#main {
  position: absolute;
  height: auto;
  width: 100%;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
}

#main .jumbotron {
  margin: 0 auto;
  max-width: 600px;
  text-align: center;
}

#main .jumbotron h1 {
  margin-bottom: 20px;
}

#main .jumbotron p {
  text-align: justify;
  font-size: 0.8em;
}
#main {
  position: absolute;
  height: auto;
  width: 100%;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
}

#main .jumbotron {
  margin: 0 auto;
  max-width: 600px;
  background-color: transparent;
  text-align: center;
}

#main .jumbotron h1 {
  margin-bottom: 20px;
}

#main .jumbotron p {
  text-align: justify;
  font-size: 0.8em;
}
Remove the gray-ness of the jumbrotron.
Remove the gray-ness of the jumbrotron.
