The only classes I’ve detected that seem even semi-relevant are:
.eapps-social-share-buttons-mobile-layout-container
.eapps-social-share-buttons-item-icon-container
.eapps-social-share-buttons-item-icon
.eapps-social-share-buttons-inner
I’ve tried applying background-color:transparent !important; to all of them and no-go. This is for the static state, not hover, if it matters. Any help?
Hi there, @Bob_Wilson 
Could you please send me a link to the page, where your widget is installed? I’ll be happy to help!
Thank you for this solution, Max:
.eapps-social-share-buttons-item::before {
background-color: transparent !important;
}
I was close, but no cigar!
It’s my pleasure 
@Max, it seems there is an unintended consequence to this mod. The “+” page is now transparent also.
Hi there, @Bob_Wilson
I am so sorry for this oversight!
We’ve updated the CSS code in your widget and it’s working correctly now:
.eapps-social-share-buttons-container .eapps-social-share-buttons-item::before {
background-color: transparent !important;
}
Please check your website and let me know if everything is fine on your end now 
@Max, everything is A-OK now. As always, thanks for your help and quick response.
No sweat