Resolved Backgroundcolor for module right

Hi, I would like to change the backgroundcolor for the module right...It's for the shopcard.
Can you help me with the css customer code....I would like it in red..the color I can change myself later...
Thank you so much.
Kind regards...

I tried this...but it doesn't work:
#sp-module, sp-right: background-color: #FF0000 ;
}