Content Area
Add the following CSS to the bottom of Appearance > Customize > Additional CSS.
Change the #67ddab to any other color you like.
a { color: #67ddab; }
Footer Menu
If your menu in the Footer area no longer matches the rest of the text, you can add the following CSS under Appearance > Customize > Additional CSS.
Change the #fff to #111 or any other color you like.
.site-footer .genesis-nav-menu a { color: #fff; }
Footer Bottom
If you add a link to the Footer Bottom widget area, and then it no longer matches the rest of the text, you can add the following CSS under Appearance > Customize > Additional CSS.
Change the #fff to #111 or any other color you like.
.footer-bottom a { color: #fff; text-decoration: none; }