CSS
table tr {border-bottom:1px solid #008999} HTML
<table width="100%" cellspacing="0" cellpadding="0"> <thead> <tr> <th scope="col">one</th> <th scope="col">two</th> <th scope="col">three</th> </tr> </thead> <tbody> <tr> <th scope="row">Hello</th> <td> </td> <td> </td> </tr> </tbody> </table>