Sexing Ameraucanas and Cuckoo Marans

[Jmay402]

Is there a reliable way to tell what genders I have of my Ameraucanas and my Cuckoo Marans. My chicks are 4 or 5 days old now. I got 8 out of 9 roosters last year on silkies and black austrolorps. Was just hoping I didn't end up like that again and if there is a good way to tell.

 

[CrazyTalk]

male cuckoo marans chicks are supposed to be significantly lighter in color than females (like a silver instead of black)