We do model it according to perception, just only when it is useful. Other colour models allow different outputs, printing with coloured ink, displaying on screen by mixing coloured lights, categorising colour, finding how bright it is etc. all need different representations in numbers.
We do model it according to perception, just only when it is useful. Other colour models allow different outputs, printing with coloured ink, displaying on screen by mixing coloured lights, categorising colour, finding how bright it is etc. all need different representations in numbers.