This tutorial is about color correction in Scratch working with RED (R3D) materials. Starting from the metadata given by the camera, it explains how we can modify them (one by one, or all at once), once we have decided on general changes we want to apply, such as color temperature.
I also leave here two complete webinars, one from Assimilate & FxGuide, and another one from Filmmaking Webinars. In the first one they talk about the controls and color correction techniques on Scratch to give your film the desired look.
This second one is about how to work with RED and Scratch from on-set to post-production.