👉 In the context of chemistry, a chroma is a type of light that is emitted by an object when it absorbs or reflects certain wavelengths of light. Chromaticity refers to the color of light, as it can be described as the ratio between the intensity and wavelength of its visible spectrum. For example, a blue light has a high chromaticity index (CIE 1931), which means that the blue light is perceived as having a warm tone or a soft color. On