I am not sure. I do know that Silkies can be very difficult to sex until they either crow or lay an egg. You might post these pics in our What Gender section for more help..
Hello and Welcome To BYC! TwoCrows gave you a good link to post on, there is also a Silkie sexing thread https://www.backyardchickens.com/t/579215/silkie-sexing if you can get good pictures of the head, especially the comb that will help
It's impossible to tell anything except they are free ranging. They aren't facing the camera, all I can see is their color.
YOu really need clear closeups, of the individual birds. showing from face and comb., and
clear, close sideview so we can see hackle feathers etc.
How old are they? Silkies cannot reliably be sexed before 4-5 mos. of age or until they crow or lay eggs. They are very difficult to sex. Before that time you are getting the best guess which can be meaningless.
Try posting their photos(good ones) on the "Silkie Thread," put that in the search box and it will pop up. Many silkie people will get a chance to comment on them.
Good luck with your poultry raising adventures, and I hope you find everything you need to know. Don't forget to take a look at BYC's very useful learning center (If you haven't already)! The learning center as well as the forum should answer your questions! There is always something new to learn! Glad to have you here! See you around with the flock.