<Tr> <Td> POI </Td> <Td> Poisonous (e.g. strychnine, alpha - Amanitin) </Td> </Tr> <Tr> <Td> RA, RAD or </Td> <Td> Radioactive (e.g. plutonium, cobalt - 60) </Td> </Tr> <Tr> <Td> CRY or CRYO </Td> <Td> Cryogenic (e.g. liquid nitrogen) </Td> </Tr>

What do the colors mean on the nfpa diamond