.navbar-fixed-top.scrolled {
  background-color: #78C2AD !important;
  transition: background-color 200ms linear;
}

.navbar-fixed-top.scrolled .nav-link {
  color:#555;
}
.navbar-dark.scrolled .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.8);
}