There's a common abuse of language that the ancestor comment uses, where we also use the names of colors for the wavelength of the pure light that we perceive t

There's a common abuse of language that the ancestor comment uses, where we also use the names of colors for the wavelength of the pure light that we perceive them as; perhaps they could have been more specific about that. Hence because of this abuse of terminology we have words like infrared and ultraviolet to refer to spectra beyond human color perception, but are so called for their relation to the particular pure wavelengths that we perceive as red and violet.