.titol{
background-color:#FFFF00;

}

principal {
   margin:0 auto;
}


.contenedorfoto {
   float:left;
   width:150px;
   height:180px;
   margin: 20px;
   padding:5px;
   background-color: #FFFFCC;
   border-right: #a5a7aa solid 1px;
   border-bottom: #a5a7aa solid 1px;
   text-align:center;
}