Objective To research the color space of the standard color board, guide the clinic work of color match, and es- tablish an foundation for deeper researching.Methods Through taking analysis of reflecting spectrum and spectral tristimulus, each parameter of the color on standard boardwas found out. The color difference between border upon colors on boardwasworked out throughmatchingthe color parameters. The number of color space between each border upon color on standard color board, di- vided byΔE=1.5, was found.Results The number of color space between each border upon colorwas 3~6. The color space was bigger in group B, but smaller in group D. The color space was bigger in high lightness area, but smaller in low lightness ar- ea.Conclusion Some color space has been found between standard color borders of VINTAGE and UNIBOND. Color of natural teeth is unable to be completely included into standard color border, especially in clinical care.
