pink and blue were gender neutral.

pink was common for men, being associated as a shade of red to show masculinity

numerous articles and books on the subject (some other tidbits, FDR wore a dress when he was young as it was common for boys at the time until age 6/7)

https://www.amazon.com/gp/product/025300117X

https://www.theatlantic.com/sexes/archive/2013/08/pink-wasnt...

https://www.smithsonianmag.com/arts-culture/when-did-girls-s...