Event Page Background Color

Hello –

The color palette of my website is dark. All the pages have been done in a dark navy blue. But I am having a problem making my events the dark color for the background. It is white.

The type will change colors, but I cant seem to find out how to change the background.

I am using the dark Umbra theme. The widget is dark (see footer):
https://temporarysiteforme.site/dd/

and the event lists are dark:
https://temporarysiteforme.site/dd/index.php/calendar/

But how can I change the individual Event background color?
https://temporarysiteforme.site/dd/index.php/event/swingin-into-2017/?instance_id=3