<!DOCTYPE html>
<head>
<style>
table {
border-collapse: collapse;
border-spacing: 0;
}
table th, table td {
border-style: solid;
border-width: 1px;
padding: 8px;
background: linear-gradient(#00BB00, #0000BB);
}
</style>
</head>
<body>
<table>
<thead>
<tr>
<th>Test</th>
<th>Test</th>
</tr>
</thead>
<tbody>
<tr>
<td>Test</td>
<td>Test</td>
</tr>
</tbody>
</table>
</body>