Looking to tint the screen on your Mac, but find that the lowest brightness setting is still too bright? May I suggest Screen Shades. It’s freeware. More information is available at versiontracker.com.
It’s really a simple application. You can choose from 4 default colors (gray, blue, yellow, and pink) or you can create your own color from the color wheel/sliders.
I have a hard time reading black text on white backgrounds though it’s much easier for me to read black on white on a computer screen compared to books. This tinting app makes it so much easier to read long stories and articles. It’s also very useful if you’re trying to conserve battery power on your laptop.