Easter Eggers can have any color legs (Green, Slate, Yellow, White, Black or any variation of the colors)
They also can come in any patter or color, lay any color egg (Green, Blue, Brown, White or any variation of the colors), come feather footed or clean leged, and have any type of comb.
Sometimes, it's just yellow skin with slate overwash in the case of my Delaware x EE cockerel, which appears to be green. BTW, his EE mother has slate legs.