I found this article called “Indonesian Volcano Erupts Electric-Blue Lava” by Robin Andrews. This is color is created when the lava burns the surrounding sulfur. The images shown are very cool! I wish I could visit these places.
The closest I can get to lava is the fire pit I have in my open patio.
Maybe I’ll look into safe ways to change the color of the flames. As exciting as it would be to have multi-colored flames, I do not want to cause unintended fumes….