Its too deep in our psyche to fight:
In Europe and the United States, pink is often associated with girls, while blue is associated with boys. These colors were first used as gender signifiers just prior to World War I (for either girls or boys), and pink was first established as a female gender signifier in the 1940s. In the 20th century, the practice in Europe varied from country to country, with some assigning colors based on the baby's complexion, and others assigning pink sometimes to boys and sometimes to girls.
Many have noted the contrary association of pink with boys in 20th-century America. An article in the trade publication Earnshaw's Infants' Department in June 1918 said:
The generally accepted rule is pink for the boys, and blue for the girls. The reason is that pink, being a more decided and stronger color, is more suitable for the boy, while blue, which is more delicate and dainty, is prettier for the girl.
One reason for the increased use of pink for girls and blue for boys was the invention of new chemical dyes, which meant that children's clothing could be mass-produced and washed in hot water without fading. Prior to this time, most small children of both sexes wore white, which could be frequently washed. Another factor was the popularity of blue and white sailor suits for young boys, a fashion that started in the late 19th century. Blue was also the usual color of school uniforms, for boys and girls. Blue was associated with seriousness and study, while pink was associated with childhood and softness.
By the 1950s, pink was strongly associated with femininity but to an extent that was "neither rigid nor universal" as it later became.
One study by two neuroscientists in Current Biology examined color preferences across cultures and found significant differences between male and female responses. Both groups favored blues over other hues, but women had more favorable responses to the reddish-purple range of the spectrum and men had more favorable responses to the greenish-yellow end of the spectrum. Despite the fact that the study used adults, and both groups preferred blues, and responses to the color pink were never even tested, the popular press represented the research as an indication of an innate preference by girls for pink. The misreading has been often repeated in market research, reinforcing American culture's association of pink with girls on the basis of imagined innate characteristics