div#modal-avviso div.modal-content{
    background-color: lightskyblue; 
}

div#modal-errore div.modal-content{
    background-color: indianred; 
}

div#modal-conferma div.modal-content{
    background-color: yellow;
}

div.modal div.modal-body{
    font-size: medium;
    background-color: white; 
}