While brightness is about intensity of light, saturation comes from proportion between its components. A few years ago, Entrepreneur published an article on the psychology of color and the misconceptions around color, branding, and color persuasion. The stronger it is, the clearer the image of the light source appears on the object. A Color Theory Reading of Todd Haynes’ ‘Carol’ December 29, 2020 The 20 Best Comedies of 2020 December 29, 2020 ‘Christmas in July’ … A light projected onto an object or figure creates lights, darks, and cast shadows. These neighbors are always colder or warmer than our sample (check their neighbors too, if you're not sure). Keep in mind that the direct light is always stronger than indirect one, so these two will never mix - indirect reflection can't cross the terminator line. Edge lines have been rendered here as well which makes the image easier to see. What should be the saturation and brightness of the local color?