A color collection is a set of coordinating palettes that work well together. Looker contains 15 color collections, which enable users to create themed visualizations and dashboards.
Each collection contains categorical, sequential, and diverging palette types. When you create a new visualization and select a color collection, Looker defaults to the palette type that works best for that type of visualization. However, you can change to a different palette in the collection or make edits to the palette you’re currently using.
Looker admins can also create a custom color collection and set it as the default for all visualizations.
The palettes for each color collection are shown below.