title: How to set up IntelliJ Idea to highlight library types in Scala code?
body: <p>I've managed to set up IntelliJ Idea to highlight most of the types, including my own classes and basic types like Int, but library classes (like Node (scala.xml.Node) and even String) are not highlighted anyway. How to fix this?</p>
  
  <p>PS: Links to good-quality up-to-date fully Scala-aware colouring themes for Idea are welcome in comments. All I've seen are quite mediocre.</p>