Objectives: Evaluation colors tooth groups follows the CIE La*b* color space in group of Diplomatic Academy students. Subjects and methods: A cross-sectional study, evaluate the color of the incisors, canines and premolar tooth using Vita Easyshade compact in 90 students of the Diplomatic Academy of Vietnam between the age 18 - 20. Results and conclusions: The results, accroding CIE La*b*: Incisors: L (84.6:+ or - 6.8), a* (-1.25 + or - 1.9), b* (19.8 + or - 4.8)
canines: L (80.+ or - 6.6), a* (1.23 + or - 1.6), b* (29 + or - 5.6)
premolars: L (80.4 + or -:7), a* (0.9 + or - 1.8), b* (27.2 + or - 3.8). There is statistically significant difference (p0.001) between 3 toothgroups. Recommendations: The results of studying can be useful for the clinician. In restorative dentistry, when chose color for incisor, canine, premolar tooth,the dentist should consider about the difference of L, a* and b* between them.