.caja_texto {
height: auto; width: auto; margin-top: auto; margin-right: auto; margin-bottom: auto; margin-left: auto; border: #000000; overflow: auto; z-index: auto; left: auto; top: auto; clip:  rect(auto auto auto auto);
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
background-color: #000000;
color: #FFFFFF;
}
<style type="text/css">
A:link {text-decoration:none }
A:visited {text-decoration:none ; color: #504A6E} 
A:hover { color:#FF3125}
body {  font-family: Arial, Helvetica, sans-serif; color: #FFFFFF}
td {  font-family: Arial, Helvetica, sans-serif; font-style: normal; color: #000000}
</style>

.referencia {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 11px;
color: #FFFFFF;
font-weight: bold
}