title: phpstorm light yellow highlight in file explorer / project window, what is it and how can I change the color?
body: <p>I just started using phpstorm, and i've noticed when I look into my <code>vendor</code> directory (managed by composer), I see the background colour is a light yellow and unreadable with my current theme. It like this in all the directories within the <code>vendor</code> dir.</p>
  <h2>what does it mean? &amp; how can I change the background color?</h2>
  <p><img src="https://i.stack.imgur.com/NkqnM.png" alt="light yellow background in project window composer vendor" /></p>