Currently, it's not possible to adjust the background color of the tabs. It seems to be a mix of the secondary color with a translucent layer of white. This also affects the secondary button, making the final result difficult to control. The current preview also doesn't show this component, so you need to save the changes and check the final result in the published component.

Another point is that it's possible to edit the border radius of the pagination, but not of the table, so when we compare one component to another, they seem disconnected.