Darkness is everywhere in Heart of Darkness
. But the novella tweaks the conventional idea of white as good and dark as evil. Evil and good don't really apply to Heart of Darkness
, because everyone in the novella is somehow complicit in the atrocities taking place in Africa. Rather, whiteness, especially in the form of the white fog that surrounds the steamship, symbolizes blindness. The dark is symbolized by the huge and inscrutable African jungle, and is associated with the unknowable and primitive heart of all men.