How can you be sure the fae use Pink for Girls and Blue for Boys? Maybe their system is the exact opposite. Or maybe they just go along with whatever color the kid likes, regardless of gender. If they even have a system. Not to mention, how do we know fae kids even have genders? Maybe they're born (or hatched?) genderless and don't know which they'll be until puberty when their bits begin to grow. 

I mean, they're mythological (fictional) creatures, right? So anything is possible.