So Mindfang said something about feeling the heat of a troll to tell their blood color. Are Highbloods hotter in temp than Lowbloods, or other way around? It would seem as though Equius is pretty damn hot, enough to evaporate milk apparently.

That’s only when he gets mad. It’s not said whether high or low bloods are the cold or hot ones. Much of the fandom seems to have settled on highbloods being the cold ones. We will probably find out for sure during Hiveswap.