Change color of ripple effects and tab focus of toolbar buttons in Files

ui/file_manager/audio_player/elements/control_panel.css

 /* Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 /* Controls bar. */
 .controls {
   align-items: center;
   background-color: white;
   display: flex;
   flex-direction: column;
@@ skipping 191 matching lines @@
 /* Invisible div used to compute the width required for the elapsed time. */
 .time-controls > .time > .current {
   align-items: center;
   display: flex;
   flex-direction: row;
   height: 100%;
   justify-content: flex-end;
   position: absolute;
   top: -1px;
 }
+
+.control-panel {
+  --files-ripple: {
+    background-color: black;
+  };
+  --files-toggle-ripple: {
+    background-color: black;
+  };
+  --files-toggle-ripple-activated: {
+    background-color: black;
+  };
+}