In the context of transmitted light and digital imaging, the primary colours are the three additive colours of the visible spectrum: red, green, and blue (RGB). By combining these colours in varying intensities, all other colours of light can be produced, forming the basis of colour reproduction in photography, television, computer displays, and digital imaging.
Understanding primary colours is essential for photographers, designers, and imaging professionals, as it underpins colour mixing, colour correction, and digital editing. Mastery of RGB primary colours ensures accurate colour representation, consistency across devices, and the creation of visually compelling images.