a.btn_bona {
    background: #625E58 !important;
    color: #EFE4DA !important;
}

a.btn_bona:hover {
    background-color: #EFE4DA !important;
    color: #625E58 !important;
}

a.btn_bona .b__text {
    color: #EFE4DA !important;
}

a.btn_bona:hover .b__text {
    color: #625E58 !important;
}