* {
  color: grey;
  background-color: lightgray;
}
h1 {
  color: darkblue;
  background-color: lightcyan;
}
#main-title {
  color: darkred;
  background-color: mistyrose;
}
.nav-link {
  color: forestgreen;
  background-color: lightyellow;
}
.color-box p {
  color: goldenrod;
  background-color: ivory;
}