The ASTM 2244-2022 standard provides a method for calculating Color tolerances and color differences using the Color coordinates of instrument measurements. The standard highlights differences in visual uniformity between different CIE color marking systems and recommends that color difference comparisons be made only within the same color marking system. The use of Delta E00 to calculate color differences is particularly recommended for industrial and commercial applications such as automotive and coatings, etc. The standard also emphasizes that the determination of Color tolerances should be combined with visual evaluation, especially for Color tolerances under different Light sources that may need to be re-verified.