Each kitten is marked differently, as this picture from the top shows. According to CFA Standards for the Scottish Fold, there are almost an endless variety of acceptable colors and patterns. One, however, that is not accepted, is the pointed color, such as is found in a Siamese.
You can see that baby #1 has lots of blue dots. It is becoming more evident that she might carry the tabby pattern, rather than being a solid blue and white.

This is only evident in one of her spots on her sides, and is almost invisible.

As the kittens grow, their color may change slightly, either deepening or lightening in intensity, and the pattern (i.e. classic, mackeral, spotted, ticked tabby) becomes more evident. Baby #2 seems to be showing signs of a tabby pattern. Baby #3 still has not decided whether to become a dilute calico or a blue patched tabby and white.