Even if we can reliably identify 12 unique divisions of spectral color, that's still very different from the 12 semitones in Western music, because the 12 spect

Even if we can reliably identify 12 unique divisions of spectral color, that's still very different from the 12 semitones in Western music, because the 12 spectral colors would span the entire range of human spectral color perception, whereas the 12 semitones repeat every octave, and humans can hear up to 10 octaves.