MIDNIGHT BLUE, 2017
Prussian Blue, the dye that gives cyanotypes their distinctive hue, is a chemical byproduct of hydrogen cyanide – or 'Prussic acid' – a residue of which was found on the walls of the Nazi gas chambers at Majdanek. The same poison gas was used for many years on Death Row in the United States, and the state of Missouri has threatened to resume its use if European pharmaceutical companies continue to block the export of drugs for the lethal injection.
In 1958, Crayola changed the name of its Prussian Blue crayon to Midnight Blue after teachers complained that German military history was an inappropriate reference for American schoolchildren. A minute past midnight is the traditional time set for executions in the U.S.