What makes one firework glow red and another blue? Different combinations of chemicals are incorporated to give Fourth of July fireworks their brilliant colors
What exactly gives fireworks their colors? According to Nathaniel Finney, senior lecturer in North Carolina State’s Department of Chemistry, fireworks get their brilliant colors from different metal salts heated to high temperatures.
Lithium and strontium salts emit red light.
Sodium salts are used to create yellow light.
Calcium salts are used for orange light.
Copper salts, despite the name, emit blue, not copper, light.
Barium salts glow with a green light.