The Matrix kind of did this, with the switch in color saturation & tint between "inside" the matrix and "outside." Inside was desaturated and tinted green; outside was desaturated and tinted blue. At the time it was considered a nuanced way of exaggerating the difference between the two.
The Wizard of Oz used this in the sense that they saved the change (from black and white to color) for a later point I the movie (about 7 minutes in, iirc). Rather than the movie starting in color the transition was used to ad splendor to the world of oz.
