Depending on lighting conditions and the viewing angle, my Aqua Prius
may look more bluish than greenish. The only true way to determine
your car's color is to look at the color code on the sticker located
on the driver's door jamb. For example, mine says: "C/TR: 761/FC95"
The 761 indicates that my car is Aqua. If the car in question is
indeed Blue Moon (Mica) Pearl, the code will be 8P5.

Here are the other color codes for the Prius:

040 Super White
6R4 Dark Green
8K8 Dark Blue
1C5 Silver