s<issors said:
^It's not obvious; color is not qualitative! It may hard to measure how blue something is, but you *can* prove that it is blue rather than green. Light waves...
You are mistaken in this assertion concerning the context which we were discussing. We were not discussing whether the subject (music, and then color) could be quantitatively defined (the first cannot, the second can), we were discussing whether the value of the preference of different persons concerning the subject could be quantitatively compared. The fact that you can prove that something is a certain color does not mean that the preference of colors in individuals can be quantitatively compared. The wavelengths and frequencies of the electromagnetic radiation of the light, lying in the visual spectrum, that is reflected from matter and reaches our visual receptors, can be measured and thus it can be determined what color it is to us. However, the value of the value (no, this is not a typo, it just goes to show how absurd comparing taste is) that we attach to color (or music) is not a quantitatively comparable characteristic, as our values differ because we differ, and any "rating system" constructed by any individual will be directly dependant from this individual, making it unusable for anyone but himself. From the way this analogy was used in the discussion it should have been clear that in this context, color is not a quantitative characteristic.
"Color" would probably correspond more to the genre of a band (you might debate whether a band is "tr00 kvlt" black metal and talk about production values, but you can demonstrate that it is, in fact, black metal and not hip-hop by looking at vocal style, blastbeats, etc) than to how good it is, which is almost entirely personal opinion.
And that is why color, in the context of what we were discussing, is a qualitative characteristic. You can demonstrate that something has a wavelength of 530 nm, and is thus green, but you can only measure how "good" this colour is for one individual, you cannot extrapolate this measurement, and even this way of measuring, to other individuals, and thus compare whether someone's taste in color is superior or inferior to someone else's. Also, your analogy of genres with colors is fallacious. Colors can be accurately quantitatively measured (not compared concerning quality, in the sense of superior or inferior), because they are tied to a continuous spectrum of electromagnetic waves. Genres cannot, their definitions are not bound to one continuously measurable entity, and are too vaguely defined as to be considered a quantitatively definable entity.