Ah I see, I’m with you now. Ok that part is hardcoded, so you’ll have to edit the actual php files.
If you open the functions.php, around line 161 you’ll see the code for the frontpage top widgets, just below that you’ll see the code for the frontpage bottom widgets.
You’ll need to copy the code for the frontpage top wdigets, where it shows the ribbon border styling etc, and paste that in to overwrite the styling of the bottom frontpage widgets below. So then both the top and bottom widgets will have the same styling.