Ei, notei alguns fóruns Discourse que exibem o recurso de destaque de postagem abaixo. Isso é um plugin, um componente de tema e, se for, foi lançado aqui?
Desculpe se estou na área errada 
This is an option known as “add staff color” visible to mods and admins in the settings spanner of a post.
I know what you’re mentioning. However, that’s not what that is to my knowledge. Those from the screenshots are done automatically with the post.
Every person with highlighted text is a staff member so its probably staff coloring.
Can also be done via CSS.