title: weird UITabBar color inconsistency in iOS7
body: <p>I'm using iOS 7's <code>tintColor</code> and <code>barTintColor</code> properties to color my <code>UITabBar</code> with this code in a subclass of UITabBarController:</p>
  
  <pre><code>[[UITabBar appearance] setBarTintColor:[UIColor colorWithRed:123/255.0 green:47/255.0 blue:85/255.0 alpha:1]];
  [[UITabBar appearance] setTintColor:[UIColor colorWithRed:227/255.0 green:180/255.0 blue:204/255.0 alpha:1]];
  </code></pre>
  
  <p>On three screens, the color is what I want it to be (only two images illustrating this):</p>
  
  <p><img src="https://i.stack.imgur.com/rV9Cp.png" alt="home screen">
  <img src="https://i.stack.imgur.com/pJbPx.png" alt="feedback screen"></p>
  
  <p>One one screen, the color is weirdly lighter. This screen is a <code>UIWebView</code>.</p>
  
  <p><img src="https://i.stack.imgur.com/S2XHx.png" alt="webview screen"></p>
  
  <p>Then on a fourth screen, the color is SUPER-light. This screen is the only one to use a storyboard--the rest are all done programmatically.</p>
  
  <p><img src="https://i.stack.imgur.com/E6Pf5.png" alt="settings screen"></p>
  
  <p>What am I doing wrong? Do the fact that the misbehaving screens are a <code>UIWebView</code> and a storyboard have anything to do with why they're misbehaving? And how do I fix them? I've fiddled with the alpha of the bar but it doesn't change anything. </p>
  
  <p>Thanks for your help.</p>