The proposal is still awaiting approval, but the work continues. One of the most frequent questions I get about "Pink and Blue" is about my claim that pink did not acquire its current symbolism until the 1970s. (A bit of explanation: by "current symbolism", I mean not only its meaning, but how powerfully it maintains that meaning regardless of context.) I have been accused of "blaming" feminists for the pinkification of girl culture, because I argue that it was feminist critiques of pink color-coding that helped solidify its symbolic meaning.
Now the more I delve into the fashions of the 1970s for my new book, the more I get the sense that something happened in the mid 1970s that super-charged pink as a feminine signifier. Here's today's clue, from the Online Etymology Dictionary:
Amer.Eng. Pink collar in reference to jobs generally held by women first attested 1977.