<Ul> <Li> Spectral power distribution </Li> </Ul> <Li> Spectral power distribution </Li> <Tr> <Th> Color perception </Th> <Td> <Ul> <Li> Color vision <Ul> <Li> Color blindness <Ul> <Li> Achromatopsia </Li> </Ul> </Li> <Li> test </Li> </Ul> </Li> <Li> Tetrachromacy <Ul> <Li> Color constancy </Li> <Li> Color term </Li> </Ul> </Li> <Li> Color depth <Ul> <Li> Color photography </Li> <Li> Spot color </Li> <Li> Color printing </Li> <Li> Web colors </Li> <Li> Color mapping </Li> <Li> Color code </Li> <Li> Color management </Li> <Li> Chrominance </Li> <Li> False color </Li> </Ul> </Li> <Li> Chroma key </Li> <Li> Color balance </Li> <Li> Color cast </Li> <Li> Color temperature </Li> <Li> Eigengrau </Li> </Ul> </Td> </Tr> <Ul> <Li> Color vision <Ul> <Li> Color blindness <Ul> <Li> Achromatopsia </Li> </Ul> </Li> <Li> test </Li> </Ul> </Li> <Li> Tetrachromacy <Ul> <Li> Color constancy </Li> <Li> Color term </Li> </Ul> </Li> <Li> Color depth <Ul> <Li> Color photography </Li> <Li> Spot color </Li> <Li> Color printing </Li> <Li> Web colors </Li> <Li> Color mapping </Li> <Li> Color code </Li> <Li> Color management </Li> <Li> Chrominance </Li> <Li> False color </Li> </Ul> </Li> <Li> Chroma key </Li> <Li> Color balance </Li> <Li> Color cast </Li> <Li> Color temperature </Li> <Li> Eigengrau </Li> </Ul>

How many shades of each color are there