Is Darcula licensed under Apache or another open-source license?

A lot of time and effort has gone into making the Darcula theme look slick.  I like it so much that I'd like to create a Stylus UserCSS theme using the colors from Darcula for some websites and host it on GitHub (see here for more info:  https://github.com/openstyles/stylus/wiki/UserCSS).

There are some Darcula styling files licensed under Apache 2.0:

• https://github.com/JetBrains/intellij-community/blob/7fcc048781a4e71a78598b367aa5af9cb46ee88b/platform/platform-impl/src/com/intellij/ide/ui/laf/darcula/darcula.css

But some other styling files do not have a license notice:

• https://github.com/JetBrains/intellij-community/blob/7fcc048781a4e71a78598b367aa5af9cb46ee88b/platform/platform-impl/src/com/intellij/ide/ui/laf/darcula/darcula.properties
• https://github.com/JetBrains/intellij-community/blob/7fcc048781a4e71a78598b367aa5af9cb46ee88b/platform/platform-resources/src/DefaultColorSchemesManager.xml 

Before I undertake this project, I would like to know whether the intellectual property of the "Darcula Theme" is licensed under an open-source license like Apache 2.0.  If it is not, I'll come up with my own color scheme.

Thanks!