H6 rule set in CSS

My student is trying to put in a rule set for her h6 and it won’t work. She types in the h6 and it immediately goes pink. She tries to apply font-style: italic; and it doesn’t work. Any thoughts?

Please show the code

Thanks for all the info you provided. If you share the code, we could better help you to solve this. Sharing the unit, lesson and bubble can be helpful too.

Did you check the helps and tips tab to see if there was anything there that might help you?

Is the student working on Unit 2 Lesson 6 or the project? ~ CeciliaZ