codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML LANG="IT">
<HEAD>
  <TITLE> </TITLE>
  <META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
  <style>
  .cella1{
  border: 1px solid #FF0000;
  } 
  .cella2{
  border: 1px solid #FFFF00;
  } 
  .cella3{
  border: 1px solid #00FF00;
  } 
  </style>
</HEAD>
<BODY>
<table>
<tr>
  <td class="cella1">Testo testo testo</td>
</tr>
<tr>
  <td class="cella2">Testo testo testo</td>
</tr>
<tr>
  <td class="cella3">Testo testo testo</td>
</tr>
</table>
</BODY>
</HTML>