1. Create a theme that you want to use for your customer community.
2. Use a workflow rule to assign the theme to a profile.Object: UserCriteria: User Type equals PartnerWorkflow ActionType: Field UpdateName: Set ThemeField to Update: ThemeValue: Use a formula to set the new valueFormula: Document ID for the theme, enclosed in single quotes
3. Object: User
4. Criteria: User Type equals Partner
5. Workflow ActionType: Field UpdateName: Set ThemeField to Update: ThemeValue: Use a formula to set the new valueFormula: Document ID for the theme, enclosed in single quotes
6. Type: Field Update
7. Name: Set Theme
8. Field to Update: Theme
9. Value: Use a formula to set the new value
10. Formula: Document ID for the theme, enclosed in single quotes