For me not fire works, i would prefer materials like magnesium, or things like this, to change colours of fire. So that, You can always make it just the way You want. Imagine, what would it be, if You put Magnesium(white flame) into points, and then surround them with rubbidium (red flame)? That would be gorgeous, just like exploding golf game in brainiac, that was nice.
If You got confused, type in Youtube Brainiac golf, all explosions, and colours... I thought about it like that, that would improve our imagination, and not be as easy to make, and use, as the fireworks feature.