Objective: To explore the correlation between color traits of Licorice and its quality evaluation by colorimeter to determine the color traits of Licorice. Method: The colors of Licorice cortex and transection were determined by colorimeter. In addition

the content of the marker components of licorice

glycyrrhizic acid and liquiritin were determined by HPLC. Result: The RSD values of all colorimetric values of licorice were less than 2%

indicating a good stability of colorimetric values

and also

the method can quantify the color traits. It avoids the individual subjective discrepancy to color recognition and the insensitivity to slight difference in color. In addition

the correlation analysis showed a significant positive correlation between colorimetric values and the marker components of wild licorice

providing a basis for the traditional sensory color evaluation for the quality of Chinese drugs. However

this rule was not applicable for planting liquorices. So the traditional sensory color evaluation to the planting materials requires further studying. Conclusion: Applicating colorimeter to determine the color traits of traditional Chinese medicine is feasible

and provides a new method and reference for the traditional evaluation methods for Chinese drugs.