I was given these two "girls" a few days ago when the person who had them could no longer care for them. I haven't owned chickens in years and even then we only ever had mature chickens, so I have no idea how tell the difference in pullets and cockerels. I am also not sure on the colors if you could help on that.... I was told they were both hens, but the darker colored one obviously has a bright red comb and wattles that are much larger then the lighter colored chicken's. I thought maybe the darker one is just a lot older and more developed? But I don't remember so much any of our bantam hens in the past having a comb that was so large. The dark one's tail feathers apparently got burnt off from him/her sitting too close to a heat lamp. Poor dear. Far as color they are both supposed to be blues. The lighter one is supposed to be a blue splashed? She definitely has darker spots all over her. I really hope they are both hens so that they can both stay, but I am afraid I ended up with a mated pair.