Tri-stimulus values refer to the amounts of the three primary colours-red, green, and blue (R, G, and B)-required to match the colour of light reflected from an object. These values form the basis of colour measurement and reproduction in photography, digital imaging, and colour science.
Photographers and imaging professionals use tri-stimulus values to ensure accurate colour matching, calibration, and consistency across different devices and media. Understanding these values allows for precise control over colour reproduction, leading to images with faithful and vibrant colour representation.