The pH-dependent characteristics of anthocyanins can be attributed to the molecular structures of anthocyanins transforming along with the pH of the solution or to the aggregations of the anthocyanins in the forms of carbinol sidebars or quinonoidal base. To our knowledge, the present study is the first to report on the color attributes represented by the Ab510, L*, or a* of SJ in a wide range of pH. These results demonstrate that pH is a more important factor of the color stability of SJ than temperature. A small variation in pH can significantly change the color and color stability of SJ, as well as increase the color sensitivity to heat.