li.ui-state-active{
    background: #007fff !important;
}
li.ui-state-active a{
    color: #FFFFFF !important;
}

#pageContent #areaclienti_custom .ui-tabs .ui-tabs-nav li.ui-state-active{
    background: #007fff !important; 
}
#pageContent #areaclienti_custom .ui-tabs .ui-tabs-nav li.ui-state-active a{
    color: #FFFFFF !important;
}