RGB colour and colour perception About RGB colour and colour perception The human eye, and so visual perception, is tuned to the visible spectrum and so to spectral colours between red and violet. RGB colour is a model used to reproduce colour in a way that matches perception. An RGB colour wheel helps to simulate: The effect of projecting lights with wavelengths corresponding to the three primary colours, red, green and blue onto a neutral-coloured surface. The additional colours produced by mixing adjacent pairs of colours such as adjacent primary, secondary, tertiary colours etc. Every imaginable colour can be produced by the RGB colour model. Remember that the RGB is an additive colour model used when mixing light of different wavelengths. The CMYK subtractive colour model is often used when mixing paints, dyes and pigments.
Seeing colour About seeing colour When an observer asks themselves what colour something is, they might refer to: Spectral colours and use names commonly associated with rainbows (ROYGBV) An extended vocabulary of colour names such as dark red, vermilion, golden yellow, lemon yellow, pale yellow, greenish-yellow, chartreuse, leaf green or light green. A specific colour model such as RGB, CMYK or HSB A family of colours such as warm or cool colours Tints or shades of colours A palette of colours they have selected or are working with.