Pink is definitely a girl. Blue is either a light colored girl or a slow to mature boy. Generally by 4 - 5 weeks a BR boy will have red and much bigger comb and wattles.
Though if it is a slower developing boy they tend to be better gentlemen than the quicker developing boys. So he's got that going for him if it is a cockerel.
Though if it is a slower developing boy they tend to be better gentlemen than the quicker developing boys. So he's got that going for him if it is a cockerel.