Registration Page Problem

When you configure all of the login page options, not all of the settings transfer to the registration page. The thing I noticed is the form background. I had mine set to a dark colour and had the text set to white, however, when users go to the registration page the form background is white and the text is also white meaning that the form labels are not visible. I have worked around this by using a colour for the label text that is visible with either a dark or light form background, but it is not ideal. Also, the corner radius is lost on the registration page, maybe other stuff as well.
My Login Page:
https://runnersmix.com/wp-login.php
My Registration Page:
https://runnersmix.com/wp-login.php?action=register