What does a blue color on the scene filename mean?

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:bust_in_silhouette: Asked By gtsiam

I encountered this behaviour when reorganising my project (Renaming, and moving); though I’m not sure as to what exactly caused it:

For some reason, the filename of one of my scenes has turned blue. It doesn’t really create any problems, or change anything, really, but it’s odd; it’s persistent, so it probably means something, but since there’s no tooltip that I can find, I have no idea what that could be.

Scene file in question

:bust_in_silhouette: Reply From: Zylann

I’m not sure, but it looks like it highlights the main scene defined in your project settings. I tried to change it to check, and it did not update. But when I restarted my project, the new main scene was blue.

Confirmed in source code: https://github.com/godotengine/godot/blob/4f5ad0734b588f223aa78193b60620d7490e633b/editor/filesystem_dock.cpp#L124

The blue letters mean that this scene is the main scene, that is, it is the one that will be executed in the project. You can change it in configuration, in the application tab and then in execute.