title: Changing the default color on flex validation errors
body: <p>The examples I've seen seem to show how to change the color that shows when the user actually hovers over the textinput field. </p>
  
  <p>However when the validation fails, a generic textInput border qill have a red line over it. My CSS file uses a border skin for the textInput, so I can't see this line. </p>
  
  <p>I was hoping there was a way to highlight the text box when it failed validation, or re-enable the red line feature. I don't want to get rid of my CSS cos it'll totally blow my color-scheme, but any tweak allowing the error line to show would be much appreciated. </p>
  
  <p>This is the CSS:</p>
  
  <pre><code>TextInput, TextArea
  {
      border-skin: Embed(source='/../assets/images/input_bg.png', scaleGridLeft=8, scaleGridRight=20, scaleGridTop=8,scaleGridBottom=9);
      padding-top:2;
      padding-left:2;
      font-size:11;
  }
  </code></pre>