In 2015, sculptor Anish Kapoor bought the black colour from Surrey NanoSystems. Not just any black: the Vantablack black which has specific chemical properties that do not occur in nature. This black, which was created for military use, is so deep that the volumes can no longer be distinguished. So it’s an ideal camouflage. Basically, this event is not new insofar as, in 1960, Yves Klein had deposited a blue colour in his name (the International Klein Blue or IKBlue). Nevertheless, Yves Klein had only legally appropriated the chemical recipe for this particular blue and, unlike Anish Kapoor’s Vantablack, everyone has the right to freely use the IKBlue. What is…