Sexing and coloring of 3 week old coturnix quail

[Asewall]

Hi I’ve been raising these baby Japanese quail from a week old. I’m new to the quail game so I need help sexing them if it’s possible yet. I’m not sure of the color difference names either but they are all different colors. 1st is all black and white, 2nd is a brown color, 3rd is the typical colored

 

[Bigtom Turkey]

This first one *might* be a male, the one in the middle is not feather sexable and the last one is a girl.