<P> Colored fire is a common pyrotechnic effect used in stage productions, fireworks and by fire performers the world over . Generally, the color of a flame may be red, orange, blue, yellow, or white, and is dominated by blackbody radiation from soot and steam . When additional chemicals are added to the fuel burning, their atomic emission spectra can affect the frequencies of visible light radiation emitted - in other words, the flame appears in a different color dependent upon the chemical additives . Flame coloring is also a good way to demonstrate how fire changes when subjected to heat and how they also change the matter around them . </P> <P> To color their flames, Pyrotechnicians will generally use metal salts . Specific combinations of fuels and co-solvents are required in order to dissolve the necessary chemicals . Color enhancers (usually chlorine donors) are frequently added too, the most common of which is polyvinyl chloride . A practical use of colored fire is the flame test, where metal cations are tested by placing the sample in a flame and analyzing the color produced . </P> <Table> <Tr> <Th> Color </Th> <Th> Chemical </Th> <Th> Image </Th> </Tr> <Tr> <Td> Carmine (dark red) </Td> <Td> Lithium chloride </Td> <Td> </Td> </Tr> <Tr> <Td> Red </Td> <Td> Strontium chloride or strontium nitrate </Td> <Td> </Td> </Tr> <Tr> <Td> Orange </Td> <Td> Calcium chloride </Td> <Td> </Td> </Tr> <Tr> <Td> Yellow </Td> <Td> Barium chloride </Td> <Td> </Td> </Tr> <Tr> <Td> Light Orange </Td> <Td> Sodium chloride (table salt) or (street lights) </Td> <Td> </Td> </Tr> <Tr> <Td> Apple green </Td> <Td> Borax (sodium borate) </Td> <Td> </Td> </Tr> <Tr> <Td> Green </Td> <Td> Copper (II) sulfate, boric acid </Td> <Td> </Td> </Tr> <Tr> <Td> Blue </Td> <Td> Copper (I) chloride, butane </Td> <Td> </Td> </Tr> <Tr> <Td> Violet </Td> <Td> 3 parts potassium sulfate, 1 part potassium nitrate (saltpeter) </Td> </Tr> <Tr> <Td> Peach (light pink) </Td> <Td> Potassium chloride </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Color </Th> <Th> Chemical </Th> <Th> Image </Th> </Tr>

What color is potassium chloride in a flame test