.ng-valid[required], .ng-valid.required  {
  border-left: 5px solid #42A948; /* green */
}

.ng-invalid:not(form)  {
  border-left: 5px solid #a94442; /* red */
}

.snack-error {
  background-color: #a94442 !important;

  button {
    color: #a94442 !important;
  }
}