<!DOCTYPE html>
<html>
<head>
<title>Titre du document</title>
<style>
table, th, td {
border: 1px solid #666;
}
</style>
</head>
<body>
<table>
<colgroup>
<col span="2" style=" width:20%; background-color:#eee;">
<col style="width:10%; background-color:#8ebf42;">
</colgroup>
<tr>
<th>Nom</th>
<th>Sexe</th>
<th>Age</th>
</tr>
<tr>
<td>Marie Legrand</td>
<td>féminine</td>
<td>19</td>
</tr>
<tr>
<td>Pierre Richel</td>
<td>masculin</td>
<td>23</td>
</tr>
</table>
</body>
</html>