.style3 {
	color: #FF0000;
	font-size: 12px;
}
<style type="text/css">

td.off {
background:url(img/off.jpg);
	color: #FFFFFF;
	font-weight: bold;
	
}

td.on {
background:url(img/on.jpg);
color:#EFEC7A;
font-weight: bold;
font-size:17px;
}

</style>