Pleasantville

This is one of my all-time favorite movies.

Twins David(Tobey Maguire) and Jennifer(Reese Witherspoon), two teens from the '90s, are transported into a '50s Black and White TV show known as Pleasantville by way of a remote given to them by a TV repairman(Don Knotts). Pleasantville is essentially the '50s interpretation of a utopia, no crime, no weather other than sunny, and the fire department's only job is to save cats from trees.

The first half of the movie pretty much mocks some cliches found in sitcoms(Why don't we see what they're reading? Because the books are blank). After, Jennifer introduces sex to this world, things gradually start going technicolor, it rains, words start appearing in the books, and a tree is set on fire.

The reason why they turn technicolor(IMO) is because the characters express deep emotions that they normally don't have. For example, Jennifer, the slacking slut, goes color after she refuses to have sex with her new boyfriend because she was studying.

Seriously people, I love this movie. It has a great message and I highly recommend you watch it.