Pedestrian Pre-Collision Systems (PPCS) for helping avoid or mitigate pedestrian crashes have been equipped on many vehicles. At present, there is no common standard for the performance evaluation of PPCSs. The Transportation Active Safety Institute (TASI) at Indiana University-Purdue University-Indianapolis with support from Toyota’s Collaborative Safety Research Center (CSRC) has been studying the various issues to support the effort of developing such a standard. An important component in the PPCS evaluation is the development of a standard mannequin. This paper describes the approaches used to determine the color of the clothing on the mannequins based on the data obtained from the TASI 110 car one year naturalistic driving data collected in the greater Indianapolis area in USA.