User blog comment:629638/Black and white/@comment-10380701-20140306075623/@comment-4010415-20140307012750

I think blue is ice, Nedz. Based on episode 2. When Ruby was on the verge of sneezing, you could see a little blue dust, as well as a little yellow dust, mixed in with the red dust. There was ice and lightning in the fiery explosion, so assuming the yellow made the lightning, the blue made the ice.