All files are red under IntelliJ project pane

Question

My project pane in IntelliJ has all files and folder in red color instead of the typical black. I can't find documentation on what does this color mean and how to fix whatever caused it so that it appears black again.

I notice that when I click on these files and folders, then choose Menu->VCS->Mercurial. It asks if I want to add them into source control. These files are already in Mercurial, perhaps this is a Mercurial problem?

Answer 1

Refer to help: File Status Highlights.