title: Change background color of uisearchcontroller
body: <p>How does one change the background colour of the uisearchcontroller? Atm it looks like this<a href="https://i.stack.imgur.com/HUJnC.png" rel="noreferrer"><img src="https://i.stack.imgur.com/HUJnC.png" alt="enter image description here"></a></p>
  
  <p>I want it all one colour. 
  I've attempted <code>sc.view.tintColor = UIColor.rgb(10, green: 150, blue: 255)</code> and 
          <code>sc.view.backgroundColor = UIColor.rgb(10, green: 150, blue: 255)</code> but doesn't remove the grey bit the side</p>