<table border="1" style="width: 100%; height: 100px;">
<colgroup>
<col>
<col span="2" style="background-color:blue;">
<col style="background-color:red;">
</colgroup>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</table>
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