How Do You Get Different Coloured Fireworks?

Explain why we get different coloured precipitate when we mix two different aqueous solutions. For example, why do we get a white precipitate, or black precipitate?

The dazzling colors seen in fireworks are due to different metal compounds, which are heated to high temperatures, similar to flame tests. What metals are responsible for the following colors seen in fireworks? A.) Yellow-Orange B.) Blue-Green C.) Red-Orange

ammonium nitrate in fireworks