The "Set Color Metadata per Agent Type" and "Set Color Metadata per Variation" tools will apply an addMetadata module on the selected agent groups and set overrides for the "color" metadata to each on all agent.
They can be found under the Atoms > Tools menu.
Users can then activate the "Use Color Metadata" option on those agent groups.
In this way users will be able to visually see the distribution of their agents types and variations in their the scenes.