Here are past answers & discussions on the topic:

• [08 Oct. 2013 | 3 comments] [Flaired Respondent | Blue & Pink, Children's Clothes](http://redd.it/1nyulx "How did blue become the "boy colour" and pink become the "girl colour"? : AskHistorians")

• [15 Mar. 2013 | 5 comments] Sourced Response | Blue & Pink, Reasoning

    Ask followup questions of flaired users by commenting with the question and a /u/ appended to a flaired specialist's username i.e. /u/OldWorldGlory.