hr {
    border-top: 1px solid #4471e3
}
h1, h2 {
    margin: auto;
    padding: 10px;
}
div.jumbotron {
    border: 4px solid #4471e3;
    border-radius: 30px;
    margin-left: 250px;
    margin-right: 250px;
    margin-top: 100px;
}