Hi,
thanks for your post, and sorry for the trouble.
Yes, this should be possible by adding an “Extra CSS class” in the table Shortcode:
[table id=123 extra_css_classes="first-column-gray" /]
[table id=123 extra_css_classes="second-column-gray" /]
[table id=123 extra_css_classes="third-column-gray" /]
[table id=123 extra_css_classes="fourth-column-gray" /]
Then, you can use those newly added CSS classes in the “Custom CSS” code to style the desired column gray, like
.tablepress-id-123.first-column-gray tbody .column-2 {
background-color: gray;
}
and so on.
Regards,
Tobias