Ticket #31345: 31345.3.patch

src/wp-admin/css/admin-menu.css

@@ -359 +359 @@
 }
 
 div.wp-menu-image:before {
-        color: #999;
+        color: #a0a5aa;
+        color: rgba(240,245,250,0.6);
         padding: 7px 0;
         -webkit-transition: all .1s ease-in-out;
         transition: all .1s ease-in-out;
@@ -366 +367 @@
 }
 
 #adminmenu div.wp-menu-image:before {
-        color: #00b9eb;
+        color: #a0a5aa;
         color: rgba(240,245,250,0.6);
 }
 
@@ -374 +375 @@
 #adminmenu .wp-has-current-submenu div.wp-menu-image:before,
 #adminmenu .current div.wp-menu-image:before,
 #adminmenu a.wp-has-current-submenu:hover div.wp-menu-image:before,
-#adminmenu a.current:hover div.wp-menu-image:before {
+#adminmenu a.current:hover div.wp-menu-image:before,
+#adminmenu li.wp-has-current-submenu a:focus div.wp-menu-image:before,
+#adminmenu li.wp-has-current-submenu.opensub div.wp-menu-image:before {
         color: #fff;
 }
 
-#adminmenu li:hover div.wp-menu-image:before {
+#adminmenu li:hover div.wp-menu-image:before,
+#adminmenu li a:focus div.wp-menu-image:before,
+#adminmenu li.opensub div.wp-menu-image:before {
         color: #00b9eb;
 }
 
+/* IE8 doesn't redraw the pseudo elements unless you make a change to the content, this restore the initial color after hover */
+.ie8 #adminmenu li.opensub div.wp-menu-image:before {
+        color: #a0a5aa;
+}
+
 .folded #adminmenu div.wp-menu-image {
         width: 35px;
         height: 30px;
@@ -537 +547 @@
         font-size: 13px;
         line-height: 34px;
         margin-top: 10px;
-        color: #00b9eb;
+        color: #a0a5aa;
         color: rgba(240,245,250,0.6);
         -webkit-transition: all .1s ease-in-out;
         transition: all .1s ease-in-out;
@@ -577 +587 @@
         line-height: 15px;
         left: -3px;
         top: -3px;
-        color: #00b9eb;
+        color: #a0a5aa;
         color: rgba(240,245,250,0.6);
         font: normal 20px/1 'dashicons' !important;
         speak: none;

src/wp-admin/css/colors/_admin.scss

@@ -211 +211 @@
         background: $menu-current-background;
 }
 
-#adminmenu li.wp-has-current-submenu div.wp-menu-image:before {
+#adminmenu li.wp-has-current-submenu div.wp-menu-image:before,
+#adminmenu a.current:hover div.wp-menu-image:before,
+#adminmenu li.wp-has-current-submenu a:focus div.wp-menu-image:before,
+#adminmenu li.wp-has-current-submenu.opensub div.wp-menu-image:before,
+#adminmenu li:hover div.wp-menu-image:before,
+#adminmenu li a:focus div.wp-menu-image:before,
+#adminmenu li.opensub div.wp-menu-image:before,
+.ie8 #adminmenu li.opensub div.wp-menu-image:before {
         color: $menu-current-icon;
 }