In fiction, and also in Real Life, we tend to differentiate between "girly" colors and "boyish" ones. This is most obvious with babies, as we are prone to see girls dressed in pink and boys in blue. This kind of dichotomy is, in fact, relatively new, and has not been wholly consistent across time and place.
Pink Girl, Blue Boy has been suggested to play 4 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.