For any film there needs to be colour involved to make the film stand out from the rest, so a colour script is made to show the colours in each scene to see if they work together. Colour wheels can be used to determine the harmonious, analogous and contrasting colours that would go into a scene.
Here are some examples of pixars work.
This is the whole colour script of the film “UP”.
These are from the film “WALL-E”.
All these are from “Toy Story 3”.