Graphviz: <table>

attribute: border

digraph {

  node [ shape=none fontname=Helvetica ]

  n1 [ label = <
    <table>
       <tr><td colspan="2" bgcolor="Peru">not spec.</td></tr>
       <tr><td bgcolor="yellow">one  </td><td bgcolor="orange">two </td></tr>
       <tr><td bgcolor="red">three</td><td bgcolor="#77ff33">four</td></tr>
    </table>
  > ]

  n2 [ label = <
    <table border="0">
       <tr><td colspan="2" bgcolor="Peru">border="0"</td></tr>
       <tr><td bgcolor="yellow">one  </td><td bgcolor="orange">two </td></tr>
       <tr><td bgcolor="red">three</td><td bgcolor="#77ff33">four</td></tr>
    </table>
  > ]

  n3 [ label = <
    <table border="1">
       <tr><td colspan="2" bgcolor="Peru">border="1"</td></tr>
       <tr><td bgcolor="yellow">one  </td><td bgcolor="orange">two </td></tr>
       <tr><td bgcolor="red">three</td><td bgcolor="#77ff33">four</td></tr>
    </table>
  > ]

  n4 [ label = <
    <table border="5">
       <tr><td colspan="2" bgcolor="Peru">border="5"</td></tr>
       <tr><td bgcolor="yellow">one  </td><td bgcolor="orange">two </td></tr>
       <tr><td bgcolor="red">three</td><td bgcolor="#77ff33">four</td></tr>
    </table>
  > ]

  {rank=same n1 n2}
  {rank=same n3 n4}

  n1 -> n3 [ style = invis ]

}

In the created graph, the table where the border attribute is not specified looks like the table where it is specified to be border="1":

attribute: color / bgcolor

digraph {

  node [ shape=none fontname=Helvetica ]

  n [ label = <
    <table border="3" bgcolor="red" color="yellow">
       <tr>
         <td bgcolor="#ffcccc">one</td>
         <td bgcolor="#ccccff" color="green">two</td> <!-- Note the color attribute -->
       </tr>
       <tr>
         <td bgcolor="#ccffcc">three</td>
         <td bgcolor="#ffffcc">four</td>
      </tr>
    </table>
  > ]

}

This dot file produces:

See also