title: Graphviz: How to change border color
body: <p>Given a node like so, on a white background</p>
  
  <pre><code>"test" [
      style="filled,dashed"
      shape=box
      color=lightgray
      label="Hello World"
  ];
  </code></pre>
  
  <p>How do I make the dashed border black?</p>