body {
  background-color: #1a1a1a;
  color: #e0e0e0;
}

.navbar {
  background-color: navy;
}

footer {
  background-color: gray;
}

.btn-theme {
  background-color: navy;
  border-color: navy;
  color: #fff;
}

.btn-theme:hover,
.btn-theme:focus,
.btn-theme:active {
  background-color: #000080;
  border-color: #000080;
  color: #fff;
}