View file public/assets/css/bootstrap-tags.css

.form-control-focus {
    color: var(--bs-body-color);
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgb(13 110 253 / 25%);
}
.was-validated :valid + .form-control-focus {
    border-color: #198754;
    box-shadow: 0 0 0 0.25rem rgba(25, 135, 84, .25);
}
.was-validated :invalid + .form-control-focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.25rem rgba(220, 53, 69, .25);
}