Have you entered the h2 { color: blue; } part correctly is there a either side of it, this tells the browser that part of the page code is css styling.
Is this the first activity in the CSS module for responsive web design?
Are you using an a plug-in or extension that changes the color? If so, it can mess with the tests.
In the future;
If you have a question about a specific challenge as it relates to your written code for that challenge, just click the Ask for Help button located on the challenge. It will create a new topic with all code you have written and include a link to the challenge also. You will still be able to ask any questions in the post before submitting it to the forum.