I have a black and a splash pullet same age as these roos (how unlucky is that? :/ ) but have 4 blue chicks at 5 weeks old now, hopefully I have more females than males. There's one that is for sure a cockerel as it's already starting to grow wattles, the other 3 are up in the air right now.
Oh nice! I only had 2 hatch the first time. Both were boys. One black and one splash. Now I have some 8 week olds. I ended up with 1 blue pullet and 2 splash pullets. I'll be keeping my black rooster for the splashes. I have a few more cockerels to grow out. I'm hoping I end up with a nice blue one.