What color are the grey kittens?

My shorthaired Calico cat got pregnant by a stray. I need to get her spayed but was curious as to what color these kittens were? I know there is a white with tan markings a white with tiger stripped markings and a very light silver tabby but two look almost smoke colored? Thanks in advance

¨These two or three darkish peculiars, its the so called fever coat.  Its no true smoke nor true point.   It will go over with time, leaving their true colors in the open.

It shouldnt have any negative consequences now.  

They're very sweet. How old are they now? Would also love to see a photo of mom!

Are you able to keep mom inside and the strays outside until she can be spayed? She can already get pregnant again, so you'll just need to be careful. Spay can be scheduled for when the kittens are 8 weeks old.