Hi Sam,
are you sure that you are using the correct table ID, 2816?
Also, don’t forget the dot at the beginning, i.e.
.tablepress-id-2816 .row-2 .column-2 {
color: #ff0000;
}
For the CSV file: Can you check in a text editor (like Notepad), if the CSV file is in the UTF-8 character encoding? Without this, the characters can not be imported correctly.
Regards,
Tobias