.tribe-mini-calendar-wrapper .tribe-mini-calendar-list-wrapper .list-date {
    background: #0a0;
    color: #aa6;
}

.tribe-mini-calendar-wrapper .tribe-mini-calendar-list-wrapper .list-date .list-dayname {
    background: #edb;
}

.tribe-mini-calendar-wrapper .tribe-mini-calendar-list-wrapper .list-date .list-daynumber {
    color: #edb;
}