<html>
<table style="width:100%; background-color:red"><tr><td>
<div style="width:150px; background-color:purple;">
<table style="background-color:blue"><tr><td>
<table style="width:100%; background-color:green; table-layout:fixed"><tr><td>
Content
</td></tr></table>
</td></tr></table>
</div>
</td></tr></table>
</html>