i tried xrandr --output eDP-1 --gamma .7:.7:.7 but nothing happen. I’m using kde with wayland.
Same with xrandr --output eDP-1 --gamma 0.7:0.7:0.7
xrandr is for Xorg, you need to install wlr-randr for wayland.
compositor doesn't support wlr-output-management-unstable-v1
… damn nvidia 