.btn.btn-success {
    background-color: #198754 !important;
    border-color: #198754 !important;
    color: #fff !important;
}

.btn.btn-success:hover,
.btn.btn-success:focus,
.btn.btn-success:active {
    background-color: #157347 !important;
    border-color: #157347 !important;
    color: #fff !important;
}