7.0 Brine: Member Area access denied screen background color

Looking to update the background color for the access denied screen for Member Areas on a Brine template with version 7.0 when using the Index Page specifically.

Here's what worked for me in the CSS Editor:

.Site-inner--index {background-color: red !important;}

Just replace "red" with your own color code and that should work!

When it says .site-inner--index is that only for the access denied page? or will it affect other pages as well?