Indigo, in food or fashion*

“He moved over to the window: a smallish, frail figure, the meagreness of his body merely emphasized by the blue overalls which were the uniform of the party. His hair was very fair, his face naturally sanguine, his skin roughened by coarse soap and blunt razor blades and the cold of the winter that had just ended. “

– George Orwell, Nineteen Eighty-Four (1949) (via)

* the Bales 2025 Film Challenge for August is not date-related but lists, for the most part, the colours of the rainbow.