We have a lot of Priuses (Prii?) in Malibu, so many that more than once I've tried to unload my groceries into the trunk of the wrong car. (One time I leaped into a blue Prius -- the most popular color here -- and scared the bejeezus out of the elderly man in the passenger seat. My identical blue Prius was parked just one space over.)
Now, thanks to that run-in with a deer, the late, lamented blue Prius has been replaced by one in the less common green. It's a lot easier to spot, but in case there's any doubt, here's the helpful hint as to which is the right car.