This standard specifies the determination of tristimulus values and color difference Delta E of cosmetic color, which is suitable for cosmetics without adding pearlescent agents. The method includes the determination of reflection color and transmission color, obtaining the tristimulus values of the sample through a fully automatic color difference meter, and calculating the color difference Delta E. The sample preparation includes specific treatment steps for different cosmetic types, such as cream, honey, nail polish, etc. The measurement steps include instrument preheating, zeroing, measuring the sample Color and calculating the color difference. The final result is the average of two measurements, and the precision requirement error is less than 0.50.