Change background colour of [wpeventticketing]

I am new to wordpress. Is there a quick was to change the background colour of the [wpeventticketing] object on my page?

Reason: Theme is not boxed and text doesn’t show up too well against my background image. I would like to have the ticket widget with a solid background

Thanks

https://www.ads-software.com/extend/plugins/wpeventticketing/