I’m having a similar problem. I’m trying to change the background color in the table at https://iareia.org/wordpress/?page_id=109 from the light gray to match the color flanking right and left. So, under “Custom CSS”, under Plugin Options, I entered:
.wp-table-reloaded-id-1 .row-1 td {
background-color: #EDEDDC!important; }
}
This appears to have no effect. Once I can control color, I’ll move on to correcting the formatting of the bullet lists.