A regular campfire is no longer sufficient, apparently. It’s not enough to have flames — you’ve got to have blue, green and purple ones! And it’s worth a half-mile walk in the dark and all of the ones in your wallet to make it happen. I wonder what the ingredients in these little packets that magically make the fire change color are, but who knows? (I’m not convinced I really ought to be exposing myself to whatever remnants float through the air.) I’m told we’re all going to die from a super volcano explosion before we’d find out, anyway. Some men just want to watch the world burn.
I imagine it is the same stuff that makes fireworks colorful. If that is the case, you have nothing to worry about. It isn’t any more dangerous than normal campfire smoke.
As to super volcanoes, even if they exists, which the science is not yet conclusive, the chances of such an event during your lifetime is exceedingly low. Worrying about such a thing is a little silly.