Symbols are not permanent

Something people should remember from time to time, and nicely illustrated by this 1920's "Dad's Birthday" postcard, presented in manly pink and swastikas.

Systematic Oppression, carefully tagged by colour

I knew, of course, of the pink triangle and yellow star.

I did not know of red, green, blue, purple, and black triangles.

I had also not previously heard the theory that it was the Germans' use of the pink triangle that made pink go from being the proper colour for boys to the proper one for girls.