pink?

I read a blog that used the word "pink" as like a noun for coolness. Specifically the blog said something about how knitting is "the new pink". What... is that? I feel like my dad when I was 9, teaching him the meaning of the word "cool" and "dude". I remember my dad saying "cool, duke!", and then me trying desperately to keep him from saying that in front of my friends. ... But pink? And knitting? Am I getting old?