NO MORE RED AND ORANGE LAVA IN MOVIES! FROM NOW ON WE HAVE BLUE, GREEN, PURPLE OR EVEN PINK! STOP HOLDING BACK! ESPECIALLY IF ITS AN ALIEN DAMN PLANET! NOT ALL CORES ARE THE SAME!!
The reason lava is always orange/yellow/white is because that glow is due to black body radiation from a hot object, similar to how a piece of hot metal glows, but the blue color here is from electron excitement in a chemical reaction (emission spectra of sulfur).
This is super cool, but holy shit there’s probably so much sulfur dioxide in the air that you would die from breathing near it.