Icon background

Thanks for a great plugin! I’ve rated it 5 stars!

I have a small question. The icons in my footer have the same background colour as the footers background. I add custom background colour via custom CSS like you instructed another user here in the forum:

.wpusb {
background: #FFFFFF;
}

But when I do that I get the result in the footer as you can see on this link:

https://test.konsultra.se/nyheter/featured-eller-vanlig-image/

My question is:

Is it possible to just change the background of the icons? If yes, how do I do that?
If not I think its a good feature…