title: Modifications to Swagger UI header
body: <p>I have created a personal WEB API using Swashbuckle and Swagger API.</p>
  
  <p>While I am able to integrate this successfully, I would like to modify the default UI for Swagger. Changing the color of the header and replacing the swagger image.</p>
  
  <p><a href="https://i.stack.imgur.com/sdr4t.png" rel="noreferrer"><img src="https://i.stack.imgur.com/sdr4t.png" alt="Attached is the part of the imagine I want to change."></a></p>
  
  <p>Is this possible by modifying existing files?</p>