title: Navigation bar button item image color is different when design through xib of xcode5
body: <p>I am creating navigation bar button using xib but when i going to set image to bar button then image colour is different as original image.</p>
  
  <p>Here is my orignal image.</p>
  
  <p><img src="https://i.stack.imgur.com/L3MEB.png" alt="Here is my orignal image"></p>
  
  <p>And after adding that image on navigation bar button item than it look like this</p>
  
  <p><img src="https://i.stack.imgur.com/HOb01.png" alt="Aafter adding that image on navigation bar"></p>