Is it possible to change background color of the Thank You page in a JotForm Card?

in the forum i see help answers that show a screen for modifying a thank you page, similar to this box with options like bold italics color link etc.  When I edit my Thank You page though, I get no options except to change the text. Is it because I'm using the new card format?

Unfortunately, there is no way to change the background color of the Thank You page in a JotForm Card.

The option to edit the Thank You page is just available in the old form layout.