Originally Posted By PerryMK
There is a nice chart here of the colors obtained by burning different chemicals. Google the chemical name and you can probably find an on-the-shelf product containing it, at least for many of them.

PerryMK, checked the link out. Most of the chemicals listed are caustic, or toxic, and best used in a Chem lab. Others, may be found in compounds that contain them. Key word there, being compound. I don't think I'd want to cook food with some of those compounds gasses (or fumes), especially near food or water that I'd want to consume.
Salt is safe, and will cause a bright yellow flame. I think I'd just recommend the OP try that first, plus, he/she probably has some at home.