Change color for autocompletion items

I'm using jdk8 with language level for 7.

When using autocompletion, with the default theme, I can see the classes that are from 8. In the example is FunctionalInterface that is red.
When using the darcula theme, all the item are in the same color.

Where do I change this for darcula theme?

IntelliJ 141.1531.2 OSX
JDK8