Talk:Hades/@comment-7092891-20150406164122

While it's true that a blue flame is hotter, it's also the most focused. The redder the flame, the more erratic it gets and something is more likely to catch that sort of flame when coming in contact than with a blue flame; with a blue flame, the object coming in contact is going to burn up/cook/heat up a lot faster.

The film isn't actually inaccurate about the nature of the flame on Hades' head. It's never really alluded how hot the blue flame on his head is, but it's likely he controls most of the heat when he's calm since Meg and Pain and Panic get close to him at least once during the film. When he loses it, the flame gets erratic, and also seems to get hotter because the flame bursts out around him.