And that's how fireworks are made.
Creating A Rainbow Of Flames Using Different Ionic Salts

This is a flame rainbow, the ROYGBIV of fire created by adding methanol to different ionic salts (listed in the screenshot above in their respective tint), which result in the various flame colors. That’s cool. I was sort of hoping for one flame with all the different colors layered like a rainbow cake, but that was not the case. I’m not angry about it, just disappointed. Kind of like I’ll be Christmas morning when I run downstairs, wonder what the smell is, and see Santa has taken a dump down the chimney.