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

ui/file_manager/audio_player/elements/control_panel.css

Index: ui/file_manager/audio_player/elements/control_panel.css
diff --git a/ui/file_manager/audio_player/elements/control_panel.css b/ui/file_manager/audio_player/elements/control_panel.css
index e85e72918309e27a60746061feaff1bfdb41b404..f6237bf5f0fc3dc0e0e4403467331db100204d31 100644
--- a/ui/file_manager/audio_player/elements/control_panel.css
+++ b/ui/file_manager/audio_player/elements/control_panel.css
@@ -209,3 +209,15 @@ paper-slider.disabled {
   position: absolute;
   top: -1px;
 }
+
+.control-panel {
+  --files-ripple: {
+    background-color: black;
+  };
+  --files-toggle-ripple: {
+    background-color: black;
+  };
+  --files-toggle-ripple-activated: {
+    background-color: black;
+  };
+}