In this lesson, we adjust the order of the Contract Status picklist values. We then create a Path for the Contract object, tied to the Status field.
Next, we introduce a new picklist field called Sub-Status. We then create a Path for this new custom Sub-Status field.
Themes and Branding - Spring '18 Release Notes - https://releasenotes.docs.salesforce.com/en-us/spring18/release-notes/rn_lightning_themes.htm