Issue:

You've changed the color of the label for your form to white, but because of the background of the form matches the input color you can no longer see information as the form is filled out.


Solution:

Change the font color of just the input values. Add the following style to a custom HTML block in the landing editor.
Depending on what types of fields you have in your form all or some of the lines will apply.

This changes the font on the input fields black , for the case of the labels being set to white(for example)

<style>
form.lpeRegForm ul select {
    color: black;
}
form.lpeRegForm ul textarea {
    color: black;
}
form.lpeRegForm ul input[type="text"] {
    color: black;
}
</style>