Not sure if this is relevant... For me, as a digital artist, the difference between null and zero often comes up. In the digital colour domain black = zero. Ho

Not sure if this is relevant... For me, as a digital artist, the difference between null and zero often comes up. In the digital colour domain black = zero. However, for a designer/artist black is as active as white or any of the hues. In most digital colour spaces there is nothing that corresponds to null i.e. 'nothingness', i.e. transparency. For this, pre-multiplied alpha must be employed. This is not new thinking. Goethe often spoke against the Newtonian understanding of black as an active presence (i.e. paint squeezed from a tube) rather than an absence of light.