[hyprland] how do i get night light/ change color temperature in hyprland?

[unborn mural]

I personally have not used that on Wayland, but you can check for app alternatives for Wayland (wlroots).
One is: https://sr.ht/~kennylevinsen/wlsunset/

[unborn mural]

you mean in hyprland?

grim + slurp

then add keybinds in your Hyprland config for various grim commands

https://sr.ht/~emersion/grim/

Hyprland wiki should have it i guess?

or just search for wayland + whatever you want :D