Event Block background CSS

Hello, please help someone…

I’d like to use the event block shortcut in a slider. To do that, I need to remove the background color of the event block.

I’m able to get rid of the other properties like the text color etc.
Today I searched all day long and I faild removing the background.

So… what do I have to insert into my custom css file for this slider page?

Thanks

Btw: Great Plugin. Makes things really easy.

https://wordpress.org/plugins/sportspress/