<!DOCTYPE html>
<html>
<head>
<title>HTML col tag</title>
</head>
<body>
<table width="280" border="1">
<colgroup span="2" bgcolor="green"></colgroup>
<tr>
<th>Day</th>
<th>Month</th>
<th>Type</th>
</tr>
<tr>
<td>Monday</td>
<td>December</td>
<td>nice day</td>
</tr>
<tr>
<td>Thusday</td>
<td>November</td>
<td>good day</td>
</tr>
</table>
</body>
</html>
