Grey occupies a modest but telling position in the depth-psychological corpus, surfacing at three distinct registers. Most consequentially, it appears as one of the named colours within the alchemical colour-sequence catalogued by Jung in Psychology and Alchemy, where it stands alongside nigredo, albedo, citrinitas, and rubedo as a transitional or liminal tint — registered but not fully theorised, an iridescent remainder that resists resolution into the primary stages. Hillman's Alchemical Psychology amplifies the broader chromatic field within which grey is implicitly situated: the transit from black through blue to white generates intermediate shades whose psychological valence (melancholy, sobriety, mortification) cannot be exhausted by any single colour-name. Thomas Moore gestures toward this same territory when he affirms that the soul presents itself in 'all the shades of gray, blue, and black,' insisting that care of the soul demands attention to its darker colourings rather than their repression. In the mythopoetic register, Kerényi's account of the Graiai — the Grey Goddesses born grey-haired, whose very name derives from the Greek word for old woman — locates grey in archaic feminine wisdom and the uncanny, linking colour to age, liminality, and chthonic knowledge. Neurobiological texts contribute a purely anatomical usage: the periaqueductal grey, a brainstem structure central to pain modulation and affective regulation. The term thus spans cosmogonic myth, alchemical symbolics, soulful aesthetics, and somatic neuroscience.
grey, 251 iosis, 229; see also red; rubedo iridescent, 251 leukosis, 229; see also albedo; white melanosis, 229; see also black; nigredo
Jung's index entry formally situates grey within the alchemical colour sequence, placing it between the iridescent and the stages of nigredo and albedo, marking it as a named but liminal chromatic moment in the opus.
, Psychology and Alchemy, 1944thesis
The soul presents itself in a variety of colors, including all the shades of gray, blue, and black. To care for the soul, we must observe the full range of all its colorings, and resist the temptatio
Moore argues that grey, alongside blue and black, is an authentic presentation of the soul's depth, and that soul-care requires confronting rather than suppressing these darker hues.
, Care of the Soul Twenty-fifth Anniversary Edition: A Guide, 1992thesis
Keto bore unto Phorkys the beautiful-cheeked Graiai, who came into the world with white hair. That is why they are called Graiai by both gods and men.
Kerényi locates grey as a mythological category embodied in the Graiai, ancient goddesses whose grey hair at birth encodes primordial age, liminal wisdom, and the pre-Olympian chthonic order.
, The Gods of the Greeks, 1951thesis
Stillness, flow on the client version, is bottom left yellow/grey. Addiction, fixate on the client version, is at the top, red/grey.
Winhall's polyvagal trauma model uses grey as a component colour encoding two distinct affective states — stillness/flow and addictive fixation — mapping the colour onto shutdown and dysregulated arousal poles.
, Treating Trauma and Addiction with the Felt Sense Polyvagal Modelsupporting
Periaqueductal grey
Craig's neuroanatomical reference identifies the periaqueductal grey as a key brainstem structure in the interoceptive pathway, anchoring 'grey' to the somatic substrate of affective and pain experience.
, How Do You Feel? Interoception: The Sense of the Physiological Condition of the Body, 2002supporting
In English, the only basic colour terms, besides black, white, and grey, that are non-spectral in nature are brown and pink.
Konstan notes grey's status as one of the few non-spectral basic colour terms in English, underscoring its structural distinctiveness within colour-categorisation theory relevant to ancient emotional vocabularies.
, The Emotions of the Ancient Greeks: Studies in Aristotle and Classical Literature, 2006supporting
φαιός [adj.] 'grey, dark grey, blackish', also of dark colors in general (Pl., Arist., Hell.+), metaphorically of the voice (Arist.).
Beekes establishes the Greek etymological range of 'grey' through the adjective φαιός, noting its extension from visual darkness to the metaphorical register of voice quality in Aristotle.
, Etymological Dictionary of Greek, 2010supporting
γλαυκός… II. later, of colour… bluish green or grey… 2 freq. of the eye; light blue, grey… Hdt. 4.108
Renehan's lexicographical note documents how the Greek term glaukos spans 'gleaming,' 'blue-green,' and 'grey,' demonstrating the ancient semantic fluidity between grey and related luminous or undifferentiated colour categories.
, Greek lexicographical notes A critical supplement to thesupporting
the term glaukos in ancient Greek is rendered variously as 'gleaming,' 'blue-green,' 'pale blue,' and 'gray.'
Konstan illustrates the instability of ancient colour terminology by noting that glaukos encompasses grey among several luminosity-based designations, complicating any fixed correspondence between Greek colour-words and modern spectral categories.
, The Emotions of the Ancient Greeks: Studies in Aristotle and Classical Literature, 2006aside
Colors are always ambivalent: their meaning cannot be purely positive or negative.
Jodorowsky's general principle of colour ambivalence in the Tarot provides a symbolic framework within which grey's intermediate position — between light and dark, positive and negative — can be understood.
, The Way of Tarot: The Spiritual Teacher in the Cards, 2004aside