Contrast can stay, for me "dark mode" or 'night theme' is about reducing the overall luminous intensity.
My own belief is that when a sea of white is removed the need for 'crisp black' to stand out against it is also reduced; this might relate to a different perceived contrast due to the lowered noise floor (far less photons being rejected, so it's easier to pick out the desired ones).
My own belief is that when a sea of white is removed the need for 'crisp black' to stand out against it is also reduced; this might relate to a different perceived contrast due to the lowered noise floor (far less photons being rejected, so it's easier to pick out the desired ones).