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 checked your form and the text or font color is black. Here's your form link http://www.jotform.com/60213262612341.
This is how it looks like in my end:
Have you tried making changes on the form using our Form Designer Tool? Here's a guide that might help: http://www.jotform.com/help/300-Form-Designer-Tutorial-Let-s-create-fantastic-forms-
You might also find this guide useful: http://www.jotform.com/help/324-A-Guide-To-Forms-For-WordPress-JotForm-Users. These are the methods on how to embed the form on Wordpress powered websites.
If you are still having problems, please do share to us the website link to where it is embedded so that we can check it better. Thank you.