What am I?

[Littlemiss42]

Usually I'm pretty good at being able to tell if I have a hen or a rooster but these babies have given me trouble. I think the light colored one in the back for sure is a rooster. I'm not sure about the darker colored one or the one with the red coloring. I hatched eggs from a seller on ebay that does a lot of mixed colors so I'm not sure of their coloring either. I'm not going to keep any roosters so I need to be able to tell so I can rehome them soon. Would appreciate any help you could give me. I can get better pictures if needed. They are 11 weeks old
Thank you