title: cell.backgroundColor question
body: <p>I found this handy code on the internet,</p>
  
  <pre><code>- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
  {
   cell.backgroundColor = (indexPath.row%2)?[UIColor grayColor]:[UIColor clearColor];
   }
  </code></pre>
  
  <p>I know that it makes every row a gray, then clear, then gray sort of pattern. But I want to switch off between a <strong><em>light gray and a dark gray</em></strong>. How can I modify the above code so I can switch between those two colors?</p>
  
  <p>Thanks!</p>