You can change the color from CSS. Please open Wp user frontend pro/assets/CSS/frontend-form.css. In this file you will get this class- ul.wpuf-form .wpuf-submit input[type=submit]/ Change the color from here.
Hello, how works the custom css? Have step-by-step instruction?
I can't find in the documentation.
If i add this custom css in settings/general options tab (see below), and in Form editor i place the my_custom_css in CSS Class Name filed, this is not work. What is the problem?