This is a list of colors, the compounds that make them, and the wavelength emmitted:
Color
Compound
Wavelength (nm)
red
strontium salts, lithium saltslithium carbonate, Li2CO3 = red strontium carbonate, SrCO3 = bright red
652
orange
calcium saltscalcium chloride, CaCl2
668
yellow
sodium saltssodium chloride, NaCl
610-621
green
barium compounds + chlorine producerbarium chloride, BaCl2
589
blue
copper compounds + chlorine producercopper(I) chloride, CuCl
505-535
purple
mixture of strontium (red) and copper (blue) compounds
420-460
silver
burning aluminum, titanium, or magnesium