title: Flutter: Outline input border
body: <p>I was trying to build a border for my text field like:</p>
  
  <pre><code>return TextField(
    ...
   border: OutlineInputBorder(
    borderSide: BorderSide(
     color: Colors.red, 
      width: 5.0),
      )
    )
  )
  </code></pre>
  
  <p>But it always return a black border with 1.0 as width. 
  The only way that I found to change the color was to create a ThemeData where I specify the hint color, but I could not find a way to change my width.</p>