The Worst Design System of All Time
During World War II, the Nazi regime created a color-coded badge system to classify concentration camp prisoners.
It was based on the six-pointed Star of David, the Jewish equivalent of the Christian cross icon. It was easy to understand at a glance, and the design standards, with examples, could fit on a single page.
The way it worked was that the color of the downward triangle was the primary classification and visual element:
Blue = immigrants, red = political prisoners, and so on. Each downward triangle can be combined with an upward yellow triangle to form a Star of David that identifies someone as Jewish as well.
Letters were used for further classification, so a red triangle over a yellow triangle with a “P” on it identified a person as a Polish, Jewish, political prisoner.
This is also the origin of the pink triangle, which represents the gay community and the LGBTQ+ civil rights movement. Between 5,000 and 15,000 homosexual men were exterminated for the crime of being gay.
Every year in San Francisco, a giant pink triangle is laid out on the tallest hill overlooking the eastern half of the city for Pride month.