I know someone who did a research on color preferences in very very young kids. Girls loved pink from the very beginning. Boys prefered yellow at first and later moved to the traditional blue or green. I see several ways to interpret the data. Could be that girls tend to like pink naturally and boys startto like blue as they inzernalize the stereotype, or girls internalize it much sooner, or it’s something else. It’s interesting non the less. Also, obviously, daltonics have completely different color preferences. It’s fun.