Seeing in colour About seeing in colour When an observer considers the colour of something, they might refer to: Spectral colours and use names commonly associated with rainbows (ROYGBV). 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. A broader vocabulary of colour names, such as dark red, vermilion, golden yellow, lemon yellow, pale yellow, greenish-yellow, chartreuse, leaf green, or light green. Post navigationPrevious post: Interneurons & the human eyeNext post: Neuron anatomy