The origin of yellow being the color of liberalism

[Yeahsayyeah]

You must be logged in to read this quote.

This does not seem to be the case. They used it in their 1949 "Macht die Mitte stark " ("Strengthen the center!") campaign posters, at least - contrasting it with socialist red and catholic black. It seems they uses yellow and black-white-red in the fifties, generally.

For those interested, you can see a collection of campaign posters since 1949 to 1998 here

http://www.bpb.de/lernen/grafstat/grafstat-bundestagswahl-2013/150415/wahlplakate-1949-1998