Jeff,
There is no specific CSS formatting for the individual feedback messages in the MCQ question.
In my "name an animal" example above, if you wanted e.g. the feedback for wrong choice of "the rose" to be displayed in red, here are two solutions which do not need hacking your Moodle files.
Solution A
- <span class="incorrect">No, that's a flower!</span>
Solution B
- <font color=red>No, that's flower!</font>
Solution A relies on an .incorrect class being present in your actual Moodle theme. The advantage is that it will take the color (and background color, etc.) of that .incorrect class, meaning you can change it as you will. Solution B is of course not advisable, as it relies on now deprecated use of font tags in HTML.
Unfortunately, this means you would have to hard-code those formattings in each and every feedback message. Not practical if you have hundreds of questions! You may want to hack your Moodle questions (or quiz?) code in order to automatically use the .correct and .incorrect CSS classes. This is what is done for the feedback messages in the Lesson questions.
Joseph
