@media print {

  .jumbotron h4 {
    color: black !important;
  }

  .jumbotron h6 {
    color: black !important;
  }

  a.nav-item.nav-link {
    color: black !important;
  }

  h4 {
    font-size: 32px;
  }

  body {
    color: black;
    font-size: 28px;
  }

}