I agree, the lowest brightness on Pixels is still too bright. I used to use the "Lux" app to reduce the brightness even more, but IMHO Lux has so many buggy features that it's not worth the trouble. I just want a manual slider. Are there any simple Android apps that can manually reduce the brightness beyond the minimum?
There are apps that filter all colours equally, but it's not nearly as good as reducing the backlight brightness would be. When 0-255 is remapped into 0-127 (or lower), you're inherently going to start losing the ability to distinguish colours. Unfortunately, you lose contrast a lot faster than you lose brightness via that method, so it's not very useful.
I wonder if a physical filter for the screen might be the simplest method.