select2/docs/_sass/_jumbotron.scss

.jumbotron {
  background-color: #F6F6F6;
  border-bottom: 1px solid #eee;
  color: #777;
  padding-left: 0;
  padding-right: 0;

  h1 {
    font-size: 36px;
    color: #777;
  }
}