div.wpcf7-mail-sent-ok {
background-color: #56b379;
color:#ffffff;
font-weight:bold;
font-size:120%;
padding:10px;
}

.wpcf7 form.sent .wpcf7-response-output{
background-color: #56b379;
color:#ffffff;
font-weight:bold;
font-size:120%;
padding:10px;
}