Gendered associations of pink and blue

Children in blue and pink clothing.
This restroom sign on an All Nippon Airways Boeing 767-300 uses pink for the female gender and blue for the male gender.

The colors pink and blue are associated with girls and boys respectively in large parts of the Western world.

Originating as a trend in the mid-19th century and applying primarily to clothing, gendered associations with pink and blue became more widespread from the 1950s onward. Since the 1990s, these gendered associations have also increasingly applied to toys as well, especially in the case of pink toys for girls. Additionally, a pink ribbon is a symbol of breast cancer awareness, and the two colors are used at gender reveal parties.