Newly hatched chicks

Two chicks have hatched so far this morning, and a third is on its way. I'm not sure if the other two eggs are going to hatch - it is difficult to see clearly inside the incubator because of the condensation. The two newly hatched chicks are strikingly different in appearance!

One is blonde, and one is black. The breeding stock the eggs came from consisted of  two Araucana roosters (one Black and one Lavender) and a mixture of Light Sussex and Rhode Island Red hybrid layer hens. The two chicks could be completely unrelated which would account for their very different appearance, or the difference could be down to one chick being male and the other female. I wonder what number 3 will look like!