LumiGuard is described as 'Experience a more comfortable screen during nighttime use with LumiGuard: Night Mode. Adjust your display's color temperature and brightness to reduce eye discomfort in low-light environments' and is an app. There are more than 10 alternatives to LumiGuard for a variety of platforms, including Linux, Windows, Wayland, Mac and Android apps. The best LumiGuard alternative is f.lux, which is free. Other great apps like LumiGuard are Redshift, LightBulb, Red Moon and Twilight.
Kumux is a dynamic circadian color scheme for code editors and other software. It adjust color temperature, color hues, contrast and brightness levels throughout the day based on the position of the sun.
Twilight Blue Light Filter is an optimal night filter that can be created to provide a warm light night screen for your eye care.
Do you use your mobile phone after sunset? Do you use your phone within three hours of your bed time? If yes, then your device might be taking your sleep away. Bluelight from your mobile screens sends a signal to brain to wake up, and makes it difficult for us to sleep at night.
Setting the color temp of the screen really only requires about 40 lines of C (80 or so all inclusive). sct is a crude utility which does roughly that. I’d say exactly that, but some of the calculations aren’t actually exact.
Small GTK GUI application to set contrast, brightness and gamma for wayland compositors which support the wlr-gamma-control protocol extension. Basically this is the example from here: https://github.com/swaywm/wlroots/blob/master/examples/gamma-control.
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