Black and white cat and grey female cat had kittens?

My cats was pregs and i got her spayed. I know population is a huge problem so even though i didnt want to do it i still had to ethically. The cat that got her pregnant was the mostly white with a little black longhaired cat that lives next door. If i had not terminated the pregancy what would the kitten colour be. My cat is blue with white socks. I looked up on the internet and the cat fancy website said only the parents colour matters. So you dont need to know the granparents which is lucky cause i dont know them for the other cat.