The color change pattern in this study had shown a similarity with the pattern achieved from studies of the color change of anthocyanin extracts form red cabbages which exhibited application as a natural pH indicator and colorant (Chen and Gu, 2013; Chigurupati et al., 2002; Lin et al., 2008; Walkowiak-Tomczak and Czapski, 2007). Likewise, the extract form the Clitoria ternatea might be applied as natural pH indicator and colorant for food, cosmetics and pharmaceutical applications; especially, with a smart packaging to monitor pH of food product (Yoshida et al., 2014). For instance, the color parameter a* (Table 4) responsible for the color change from red to green can be used to correlate and predict pH value of the extract. This had proved the applicability of the extract as pH indicator for smart packaging. Hence, the equation of color parameter a* can be a starting framework on how the color on the Clitoria ternatea flower extract can be used to monitor pH of a product using the smart packaging.