In this article, we seek to open up the study of affect and organization to colour. Often simply taken for granted in organizational life and usually neglected in organizational thought, colour is an affective force by default. Deploying and interweaving the languages of affect theory, critical theory and organization studies, we discuss colour as a primary phenomenon for the study of ‘critical affect’. We then trace colour’s affect in conditioning the unfolding of organization in two particular ‘colour/spaces’ – Adorno’s grey and Taussig’s blue of our title – and discuss both its ambiguity and critical potential. Finally, we ponder what colour might do to the style of an organizational scholarship attuned to affect, where sentences blur with things and forces more than they seek to represent them.