1 pointPerhaps we should start "classifying" by wavelength of light in the visible spectrum. Might save a lot of confusion when ordering paint for example. Exactly what colour is mustard or sahara sunset yellow. and as for avocado.it can be either dark green or deep purple or anything in between depending on how ripe the avocado is. When i were a lad paint was either black, white or magnolia.(but magnolia was only for the posh people).