Adjusting color of form or buttons

Hi to you all,
Is there any way to change the color of the form (now: white) and buttons (now: grey) made in the Visual form builder? I cannot find this anywhere.
Thanks.
Best regards,
Marcel
Is there any way to change the color of the form (now: white) and buttons (now: grey) made in the Visual form builder? I cannot find this anywhere.
Thanks.
Best regards,
Marcel