Na łatwiznę tak:
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body bgcolor="#392644">
<table>
<tr><td style="background-color:#744a8e; border-radius: 10px;">asdasasdasasdasasdasasdas</td></tr>
<tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr><tr></tr>
<tr><td style="background-color:#744a8e; border-radius: 10px;">asasdasdasasdas</td></tr>
</table>
</body>
</html>