Green is not a wavelength of light. Last time I checked, wavelength is measured in units of length, not in words. We might call light of wavelength 520nm “green” if we want, and we do BECAUSE we are conscious and we have the qualia of green whenever we see light of wavelength 520nm. But this is only a shorthand, a convention. For all I know, other people might see light of wavelength 520nm as red (i.e. what I describe as red, i.e. light of wavelength 700nm), but refer to it as green because there is no direct way to compare the qualia.
Green is not a wavelength of light. Last time I checked, wavelength is measured in units of length, not in words. We might call light of wavelength 520nm “green” if we want, and we do BECAUSE we are conscious and we have the qualia of green whenever we see light of wavelength 520nm. But this is only a shorthand, a convention. For all I know, other people might see light of wavelength 520nm as red (i.e. what I describe as red, i.e. light of wavelength 700nm), but refer to it as green because there is no direct way to compare the qualia.