CSS: where is that footer code?

Despite all the CSS hunting tricks I cannot find the part that customizes the color of the footer from #ffffff to #a1cdfb. It seems that more CSS parts are involved.

So far I have customized:

.site-footer {
	background-color: #a1cdfb;
	border-top: 0px solid #ededed;
	font-size: 16px;
	font-size: 1rem;
	margin: 0px auto 0 auto;
	margin: 0rem auto 0 auto;
	max-width: 960px;
	max-width: 60rem;
	padding: 0 0 0 0;
	padding: 0 0 0rem 0;
}

and also

.footer-widgets .site-footer {
	background-color: #a1cdfb;
	padding-top: 5px;
	padding-top: 0.3125rem;
}

and I changed too:
.site-info,
.site-info-2 {
background-color: #a1cdfb;
font-family: “Franklin Gothic”, “Helvetica”, sans-serif;
font-size: 12px; /* Make tap targets larger to provide a better user experience on mobile devices. */
font-size: 0.75rem;
font-weight: lighter;
}
But still this didn’t do the trick. Still a part of the footer area stays white.

* What did I do wrong?
* Could it be so, that Windows10 is in the way here? (I only started using that browser (@#$%^&*) recently.

@tomas: you know me from an other account which I have lost the logins of. That’s why I created this new account. Will send you an email soon and a donation through PayPal soon!!