Colour ScriptColour scripts serve a

Colour Script
Colour scripts serve a functional purpose in animation. Due to the nonlinear production process of computer animation, the director needs all the clues he can get as to what the finished image might look like on the screen. The colour script is an early attempt to map out the colour, lighting, emotion and moods in a film. It’s not about making a single pretty piece of art; the color script evolves throughout the early stages of the film, hand in hand with story development.
The Incredibles Colour Scripts