Untitled string in Mermaid Config Schema

https://mermaid.js.org/schemas/config.schema.json#/properties/themeCSS

Abstract	Extensible	Status	Identifiable	Custom Properties	Additional Properties	Access Restrictions	Defined In
Can be instantiated	No	Unknown status	Unknown identifiability	Forbidden	Allowed	none	config.schema.json*

themeCSS Type

string