It’s also worth noting that it wasn’t the hydrogen that caused the fire. The Hindenburg had an aluminium skin. It began having degradation issues, so they painted it. The paint was iron oxide based. Aluminium and iron oxide are the 2 main ingredients in thermite.
Analysis of the video shows that it was the skin burning off. It would have gone up almost as badly, even if filled with helium.
I can’t see it as anything but white and gold. However, other photos clearly show it is black and blue.
Interestingly, if I’m scrolling past, my brain will sometimes perceive it as black and blue for a fraction of a second. I can normally flip optical illusions at will. This one jams me in the wrong viewing mode.