Living Lines Library, or Livlily, is a collection of pencil tests, character model sheets, concept art and more, reaching as far back as Dumbo and as far forward as Rio and Puss in Boots. It reaches both short foreign films to full length features, and you can search by animator or movie. Either way, it’s great reference.
These are color scripts from Dreamworks Animation Rise of the Guardians of Jack Frost’s introduction to the Guardians. These are good examples of understanding how color communicates the mood of scenes and a characters unique presence.