Blackness occupies a pivotal position within the depth-psychological corpus, functioning simultaneously as a phenomenological state, an alchemical stage, a chromatic symbol, and — in certain mystical traditions — an attribute of the divine itself. The dominant axis of interpretation runs through the Jungian and post-Jungian engagement with the alchemical nigredo: Edinger establishes blackness as the hallmark of mortificatio, the most negative operation in the opus, from which growth and rebirth paradoxically emerge; Hillman radicalizes this by interrogating the intentionality of blackness itself, cataloguing its psychological performances — the extinguishing of perceptual color, the dissolution of meaning, the breaking of fixed states through putrefaction and mortification — while warning of its tendency toward a dangerous literalism that is ‘blacker than black.’ Abraham and the Jungian commentarial tradition identify blackness with the nigredo as the initial, unavoidable night of the opus. A second, quite distinct axis is furnished by Corbin’s scholarship on Iranian Sufism, where blackness ascends from privation to theophany: the ‘black light’ of the Deus absconditus designates not absence but overwhelming luminous proximity, an apophatic excess that blinds the inner eye precisely because it is too near. Woodman’s imaginal testimony adds a third register — lived, gestational, protective — in which blackness shelters the incubating light rather than simply negating it. The tension between these registers — blackness as pathological arrest, as necessary dissolution, and as transcendent plenitude — constitutes the productive conceptual fault-line that makes this term indispensable to any serious reading of the corpus.