Hello @teocr,
Thank you for the question.
Currently, you can apply custom styles to the table only via CSS.
You can add it to the theme CSS file or via Appearance > Customize > Additional CSS.
Here is also a CSS snippet to change bg color to transparent:
.jsgrid .jsgrid-row>.jsgrid-cell,
.jsgrid .jsgrid-alt-row>.jsgrid-cell,
.jsgrid .jsgrid-grid-header,
.jsgrid .jsgrid-header-row>.jsgrid-header-cell {
background: transparent !important;
}
Hope it helps.
Regards,
Ian