We can tell if something is red or blue, but red and blue are huge spectra. That's like telling the first third of a piano keyboard from the second. Even I can

We can tell if something is red or blue, but red and blue are huge spectra. That's like telling the first third of a piano keyboard from the second. Even I can do it. Absolute pitch is more like telling exactly what wavelength it is (to a certain degree of course). Most people can't do that.