What is the formula for salt to produce green light in a fireworks display?

To produce green light in a fireworks display, the primary chemical used is barium compounds, often barium chloride (BaCl₂) or barium nitrate (Ba(NO₃)₂). When these compounds are heated, they emit a green color due to the excitation of barium ions, which release energy in the form of green light as they return to their ground state.