Problem with change color

Hello, I have a problem I have a site on Zeever Gutenberg template.
When I plug in widgets on the site I can’t change their color even though they have options in the options to set for example in the black version of the widget view I always have it all shown in white on my site, I’ve probably done everything I changed the color code , added css, changed the page type block etc still the same problem.

This applies to the widget : Economic calendar and trading view, where in the wordpress settings and on the official pages is the widget code in black.

I would very much like to ask for help because I feel helpless already I have been struggling with this for 2 days.