.admin__menu .level-0.item-pagarme > a:before {
    content: url('../images/avatar-pagarme-white.svg');
    height: 28px;
    margin: 0 auto;
    width: 30px;
    opacity: 0.6;
}

.admin__menu .level-0.item-pagarme > a:hover:before {
    opacity: 1;
}