In HLWM unfocused windows have their opacity reduced to something like 80%-90%. I would like to remove this feature and I can't seem to find the correct config options for this.
herbstlufwm version 0.8.3
Herbstluftwm doesn't handle window opacity, this is handled by the compositor, in my case picom. In picom.conf I have set inactive-opacity = 1 to obtain the desired outcome.