<Tr> <Th> Producer (s) </Th> <Td> The Rolling Stones </Td> </Tr> <Tr> <Th_colspan="2"> The Rolling Stones US singles chronology </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> "In Another Land" (1967) </Td> <Td> "She's a Rainbow" (1967) </Td> <Td> "Jumpin' Jack Flash" (1968) </Td> </Tr> </Table> </Td> </Tr> <Table> <Tr> <Td> "In Another Land" (1967) </Td> <Td> "She's a Rainbow" (1967) </Td> <Td> "Jumpin' Jack Flash" (1968) </Td> </Tr> </Table>

What is the meaning of the song she's a rainbow