Are you seeing anything at all? The intended appearance is mostly red and black with a "photo negative" appearance, just like a photographer's darkroom.
I'm still having problems with the Darkroom mode....when I try to enable it, it immediately quits and returns to whatever the current F.lux setting is. I'm hoping there will be a Darkroom update soon.....
@Adam-Michael-Sasine Make sure you have "automatically adjust brightness" in Display system preferences turned off. Other than that I don't know, but in an emergency you can run RedScreen for Mac OS. You have to quit f.lux first, otherwise exactly the same thing will happen! It can be a symptom of two different things trying to adjust the screen at the same time.