ensl.org/app/assets/stylesheets/components/_shoutbox.scss

/*
  Shoutbox Messages
*/

.shoutmsg {
  margin-bottom: em(5);

  .timestamp {
    font-size: em(14);
    border-radius: em(3);
    background: $light-blue;
    color: white;
    display: inline-block;
    font-style: italic;
    padding: 0 em(6);
  }
}