What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I noticed that you had your hash sign entered twice on your question. Was this the same case on your actual form? If so, that's probably the reason why your custom color wasn't showing. You need to have only one hash before the hex color (#xxxxxx).
I also don't see anymore any dark gray sub labels on your form, so I guess you were able to sort the problem out.
If you need further questions or concerns, please do let us know.