Is it possible to style an Entity Relation Diagram with Mermaid.js like Flowcharts to indicate a difference in entities?

I can't seem to style any elements within my ERD.

Having an entity called PERSON, any of the following code results in a syntax error:

style PERSON fill:#f9f;

or

classDef className fill:#f9f; 
class PERSON className;

or

classDef default fill:#f9f;

Looking at the documentation, I should be able to use simple styling: https://mermaid-js.github.io/mermaid/#/entityRelationshipDiagram?id=styling

Basically I'm trying to make a high level ERD where I need to mark certain entities to indicate a difference.

Any help or advice would be appreciated. :-)