title: iOS - color on Xcode simulator is different from the color on device
body: <p><strong>Overview</strong></p>
  
  <p>The background color of my iPhone app in the simulator (iMac) looks different from the color on the device (iPhone 3GS).</p>
  
  <p><strong>EDIT (following section has been added)</strong></p>
  
  <p>The following are all different:</p>
  
  <ol>
  <li>story board color (xib file) </li>
  <li>simulator color</li>
  <li>device color</li>
  </ol>
  
  <p>I suppose I should go with how it looks on the device. </p>
  
  <p><strong>Questions</strong></p>
  
  <ol>
  <li>Is this is a common problem other developers face and is there a way to match the colors (systematic procedure) ?</li>
  <li>will the color look different on different versions of iPhone (3gs / 4 / 4s) or all the color ?</li>
  <li>Am I missing something, is there any specific color profile I should use ?</li>
  <li>Is there something like a rule of thumb where RGB values vary by a certain percentage ?</li>
  <li>In iPhone 4 and 4S, do the color match the simulator ? ( I don't have a iPhone4 and 4S, so I am not sure.)</li>
  </ol>