At the end of the movie, when she is dropping Tom Hanks off at his house after she finds out that he is 13 years old, look closely at the car. You'll see that when it's a close up shot, the car is blue. But when it's a far away shot, the car isn't. I guess they forgot to get two cars of the same color!
This is not a slipup. The car is not blue. The car stays a light red color the whole time. It the combination of the reflection of the trees and the shadow of the trees that gives it this dark blueish color when they are showing the closeup of the woman in the car....but i guarantee you...the car stays red.
Yeah, sorry, but the car is red. And I don't even think it's the sunlight that makes it look blue. It's really just the trim around the windows. Watch again and look and the back of the right side mirror. It is definitely red.