The CIE 1931 color space is a color representation model developed by the International Commission on Illumination (CIE) in 1931. It provides a standardized way to describe colors based on human vision, using three primary color components: X, Y, and Z. The model is based on experimental data about how people perceive colors, making it a foundational tool in color science. This color space is often visualized in a two-dimensional graph called the CIE chromaticity diagram, where colors are represented as points. The Y component corresponds to brightness, while the X and Z components define color hue and saturation. This model is widely used in various fields, including photography, design, and display technology.