They were blue to minimize racial skin-color cues.
After this, the participant was instructed to attempt to locate the second model from the 33 described above.
If this isn't sickeningly funny for you to watch, you probably won't like many other Japanese game shows.
Because who cares about future employment? My own father tried to teach me how to play soccer, but gave up when he realized that my body type was meant for video games, not sports played on grassy fields.