Index: wp-content/themes/twentyfourteen/style.css
===================================================================
--- wp-content/themes/twentyfourteen/style.css	(revision 25473)
+++ wp-content/themes/twentyfourteen/style.css	(working copy)
@@ -1875,7 +1875,7 @@
 	height: 1.8rem;
 }
 .bypostauthor .avatar {
-	background-color: #24890d;
+	background-color: #000;
 }
 .says {
 	display: none;
Index: wp-content/themes/twentyfourteen/inc/customizer.php
===================================================================
--- wp-content/themes/twentyfourteen/inc/customizer.php	(revision 25473)
+++ wp-content/themes/twentyfourteen/inc/customizer.php	(working copy)
@@ -131,7 +131,6 @@
 		input[type="submit"]:focus,
 		.header-extra,
 		.search-toggle,
-		.bypostauthor .avatar,
 		.widget-area button,
 		.widget-area html input[type="button"],
 		.widget-area input[type="reset"],