Sappan Wood and Turmeric were extracted and various colors were developed by combination of these two natural colorants. The medium colors such as yellow-red were represented by the combination of Sappan Wood and Turmeric extracts based on the mixing portion of these colorants. After the mordanting, the absorption bands of silk fabrics dyed with Sappan Wood were shifted to longer wavelength side, but those of silk fabrics dyed with Turmeric were little changed. The K/S values at 520 nm were increased gradually with increasing the mixing portion of Sappan Wood. In various mordanting methods, the K/S values of pre-mordanting silk fabric were higher than those of post- and simultaneous-mordanting, but in the case of Cr the simultaneous mordanting provided the highest K/S value. And the wide range of colors (Y~YR~R~RP) were obtained according to various mixing portion of Turmeric and Sappan Wood, mordants, and mordanting methods.