Hi Marcus
the color is set in the Customiser > Additional CSS under the /* Foooter */
I have added comments below to highlight.
.widget .social-icon a {
margin: 0;
border-width: 2px;
border-style: solid;
width: 40px;
height: 40px;
line-height: 40px;
text-align: center;
color: #f1f1f1; /* social icon color */
display: inline-block;
font-weight: 700;
margin-right: 10px;
}
.widget .social-icon a:hover {
color: #09BE9F; /* social icon hover color */
}
If you remove both of the color rules then they will inherit the Link colors set in the Customiser