.error
{
    border-width: 2px;
    background-color: #fefacb; /*LemonChiffon*/
}

/*The following class is used in the error message cell of the table
rendered by the ValidationCalloutExtender
Here: We update the out of the box style with our own style(s). */
.ajax__validatorcallout_error_message_cell
{
  font-weight:bold;
}