How to use the Markdown Formatting Assistant plugin to change selected text color?

Things I have tried

I have enabled the Markdown Formatting Assistant plugin.
I tried selecting text and clicking the little pen icon, but it just puts a <mark> tag around my selection, which does not help me very much.

What I’m trying to do

I’m hoping to select some text and change its color, a basic editor feature that Obsidian really lacks.
How would I accomplish this using MFA?