Changing colour/shape of bar at base of page that buttons sit in

Hi, I have created many forms and design them to quite a degree, however can never get to an option to change the footer bar colour or shape (see screenshot, section outlined in blue). Can anyone help show where this can be edited? It seems to be default with no option to amend that particular section...

Thank you!

To change the shape and background color of the Submit button section, you need to inject a custom CSS in order to customize it. For example, please inject the custom CSS below:

li[data-type="control_head"]:first-child, li[data-type=control_button] {

    border-bottom-left-radius: 20px;

    border-bottom-right-radius: 20px;

    background:#d9ceb2;

}

Here's the guide on How to Inject Custom CSS Codes