Change Colors of Icons

I got the icons in the menu bar, and I installed the CSS in the editor to customize the colors, but the icons are showing up clear and there is no background color. I’m assuming I maybe installed the code in the wrong spot on the stylesheet? Or is there something else I missed?

https://www.diynaturalbedding.com/

Genesis with Agency child theme.

Thanks!

https://www.ads-software.com/plugins/genesis-social-profiles-menu/