In this study, the effects of various factors on anthocyanins extracted from Clitoria Ternatea L. petals were determined. As a result, the highest proportion of anthocyanin, 1.21 mg/g FW, was obtained when extracting Clitoria Ternatea L. petals with 100% methanol, with the solvent/sample ratio of 10ml/g at 37 o C for an hour, the extract with 100% ethanol had the second highest anthocyanin content. These extracts contained phenolic compounds ranging from 24.7x10 3 ±8.55x10 2 µg GAE/g FW to 18.8x10 3 ±2.46x10 2 µg GAE/g FW, while the figures for their total flavonoid content were between 18.8±0.149 and 15.5±0.091 mg QE/g FW. The values for 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging capacity and the highest total antioxidant activity were EC50=904.2±0.327µg/ml and 2.86x10 3 ±1.01x10 1 µg AAE/g FW, respectively. It also showed that the Clitoria Ternatea L. petal extract also had potential to be developed into a pH indicator, however, further study should be carried out to obtain highly qualified one.