The GB/T 11942-1989 standard provides methodological guidelines for chroma measurement of color building materials. It specifies the instruments and equipment required for measurement, standardizes the measurement process, including sample preparation, measurement Environmental requirements and specific measurement procedures. Through this standard, the chroma of color building materials can be accurately determined, providing data support for material color mass control, color design and application, ensuring that building materials meet the design and use requirements in terms of color, and are suitable for color building material production, architectural design and construction, etc., to help create a color-coordinated architectural environment.