I'm using Mermaid to create a sequence diagram in Markdown. I'd like to highlight some of the participants and to gray some of the arrows.
I only see how to change the theme color, not how to change the color of a specific diagram element. Is it possible?
Nowadays, it isn't possible to style sequence diagrams. There is an open issue in their bugtracker. Click the link and vote for it :-)
You can style other types of diagrams, as answered by @lutz-dieckhofer.
Take a look at the Mermaid documentation, there is also a paragraph about the styling of individual nodes:
https://mermaid-js.github.io/mermaid/#/flowchart?id=styling-and-classes
I hope this what you are looking for.
