Preview the picture after you take it to see that the fireworks are the proper color. If the fireworks are unusually pastel but still bright, try decreasing the ISO. Then if you got the ISO down to 100, minusing the exposure compensation comes next if needed.
The combination of ISO and exposure compensation may be different if you start taking the picture after the fireworks start to appear versus start taking the picture (long exposure) while the sky is still black. So you will need two of these combinations at your fingertips.
The nice thing about a digital camera is that you can experiment and test out things all you want without "wasting money on film".
You would do well to set aside another evening to just enjoy the fireworks. Very few people can wear a photographer's hat and a guest's hat at the same time.
(Don't get me talking about the parent's hat which too can only be worn alone.)
Disney hints: http://members.aol.com/ajaynejr/disney.htm
thank you for your help, . that's really good info and that's one godo advice without asking me to get a tripod. Thanks so much
this is the type of help i need, . . general info about what to set exposure or shutter or ISO. That helps me a lot!