<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
table, th, td{
border: 1px solid #8c8c8c;
}
</style>
</head>
<body>
<table>
<colgroup>
<col span="2" style="background-color:red">
<col style="background-color:green">
</colgroup>
<tr>
<th>Roll No</th>
<th>Name</th>
<th>Mark</th>
</tr>
<tr>
<td>1</td>
<td>Brendan</td>
<td>90</td>
</tr>
<tr>
<td>2</td>
<td>Eich</td>
<td>92</td>
</tr>
</table> </body>
</html>