title: Change background color of flutter app icon
body: <p>I want to change background icon to <code>#fe6017</code>.
  I use <code>flutter_launcher_icons</code>, set <code>adaptive_icon_background: &quot;#fe6017&quot;</code>. But it doesn't work.
  I also try to resize image. But it always shrinks and put <code>white</code> color around my image. Thank you.</p>
  <p><a href="https://i.stack.imgur.com/xgkI5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/xgkI5.png" alt="enter image description here" /></a></p>