Index: src/wp-admin/css/colors/_admin.scss
===================================================================
--- src/wp-admin/css/colors/_admin.scss	(revision 48906)
+++ src/wp-admin/css/colors/_admin.scss	(working copy)
@@ -759,3 +759,13 @@
 .wp-full-overlay-footer .devices button:focus:before {
 	color: $highlight-color;
 }
+
+.wp-core-ui select:hover {
+	color: $highlight-color;
+}
+
+.wp-core-ui select:focus {
+	border-color: $highlight-color;
+	color: $highlight-color;
+	box-shadow: 0 0 0 1px $highlight-color;
+}
\ No newline at end of file