title: Change FocusRing color of NSTextField, NSTextView
body: <p>How to change focusRing color from Blue to Red.</p>
  
  <p>(This question is in continuation with <a href="https://stackoverflow.com/questions/16494661/generic-validation-on-input">Generic validation on input</a>, here instead of setting a default blue focus, I need red one.)</p>
  
  <p>The default looks like this :</p>
  
  <p><img src="https://i.stack.imgur.com/yn4hQ.png" alt="enter image description here"></p>
  
  <p>I need something like this (<em>Note: The image shown is not perfect as drawn inside Box</em>) :</p>
  
  <p><img src="https://i.stack.imgur.com/AaLQF.png" alt="enter image description here"></p>
  
  <p>I tried few things from </p>
  
  <ol>
  <li><a href="http://www.cocoabuilder.com/archive/cocoa/241956-how-to-change-focus-ring-color.html" rel="nofollow noreferrer">http://www.cocoabuilder.com/archive/cocoa/241956-how-to-change-focus-ring-color.html</a></li>
  <li><a href="https://stackoverflow.com/questions/1049405/cocoa-focus-ring-color-animation">Cocoa focus ring color animation</a></li>
  <li><a href="http://toomasvahter.wordpress.com/2010/06/13/drawing-focus-rings-in-nscell-and-nsview/" rel="nofollow noreferrer">http://toomasvahter.wordpress.com/2010/06/13/drawing-focus-rings-in-nscell-and-nsview/</a></li>
  </ol>
  
  <p>but no success.</p>
  
  <p>Your help is needed.</p>