====== Blue Light Filter on Wayland ======

Using a blue-light filter makes it easier to look at a computer screen late into the night.

I previously described how to use ''redshift'' on classic X11 in this article: [[scripts:i3:blue_light_filter|Blue Light Filter using Redshift]].

However, a redshift doesn't work with wayland based windowing systems like ''sway'' (based on ''wl_roots'').

An alternative program that works in (practically) the same way is called ''gammastep''.

Just like redshift, to enable the filter with a set color temperature:

  gammastep -O 4500 &
  
Where 4500 is the desired color temperature (4500k in this case).

To disable, just run

  gammastep -x