The ASTM D 2244-23 Standard Practice for Calculating Color Tolerances and Color Differences from the Color Coordinates of Instrument Measurements provides a method for calculating Color tolerances and Color differences from the Color coordinates measured by the instrument. The standard specifies how Color data can be obtained using a Color measuring instrument, such as a spectrophotometer, and the degree of difference between different Color samples can be determined through a calculation formula. This process is critical for color management in industries such as Coating, Printing, Spinning & Weaving, helping to ensure conformity and controllability of products on Color. The standard also defines methods for calculating Color differences, including accurate color difference assessment using a CIE color space model such as CIE Lab or CIE XYZ. By adopting the standard, industries can more precisely control the Color matching of products, improve production efficiency and reduce color difference issues to meet customer demand for color conformity.