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.
The thing is user is preparing forms for their website and for this cause they are choosing transparent form background. Due to that the white colored will not be readable neithen on the v4 nor on the v3 builder.
The user's actual complaint is, when you try to edit a label in v3, the input box gets a default white background and black font color, but on the v4 we are directly rendering the changes on how they will look up on the form in the final.
For the time being, best we can do is to suggest them selecting a page color which will ease their workflow.