title: Invert colors in UIWebView or UITextView
body: <p>I was wondering if anyone knew if there was an easy way to invert the colors of a UIWebView or UITextView. I know it is possible to invert all on your iPhone, but I do not want the user to have to do that, they should be able to with one click in app, invert the colors so that if it is a low light situation, reading something will be easier and less intrusive to people around the user. </p>
  
  <p>Thanks for any help!</p>