title: change background of the currently open file tab in vscode
body: <p>Is there any way to change the background of the currently open file tab? I like the dark mode, but find it difficult to distinguish between the current file (black background) and other open files (dark gray background).</p>
  <p><a href="https://i.stack.imgur.com/qkvki.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/qkvki.png" alt="enter image description here" /></a></p>