chromoclasm

noun

1. The elimination or reduction of colorfulness for religious reasons.“The preference for sombre, dark clothing does not only reflect "bourgeois" values, but also what Pastoreau characterises as the "chromoclasm" or "war against colour" being an important dimension in the new Christian morals of Protestantism - in fact, Pastoureau actually links this "chromoclasm" explicitly to the distinct cultural opposition between black and white and colour in cinema.”