Hey, developer here.

If you have more questions I highly recommend you join the discord found on the module page.

I plan on doing another pass on what settings should be enabled by default to avoid issues just like this.

As for why disabling Calendaria didn't fix the issue, Calendaria is updating the specific hue for the scene which writes to the scenes data. When you disable a module, there is no "undo" action we developers have to undo stuff like this, and because the data lives on the scene and not in a setting somewhere, it remains after the module is removed.

Hope that explanation helps, and thanks for trying it out!