On the topic Change a variable for a specific area I answered correctly, yet it failed the test and could not proceed. I entered–penguin-belly: white; where I was supposed to, yet I get a test message and I could not proceed to the next topic.
If you are using Safari, I’d try a different browser.
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.