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

ui/file_manager/video_player/video_player.html

Index: ui/file_manager/video_player/video_player.html
diff --git a/ui/file_manager/video_player/video_player.html b/ui/file_manager/video_player/video_player.html
index c9dff59dc80c4f79cebf1c6978a9b0bf7f3e49f0..eb3bf319ceea5ccef967aac2fc07abdd545477cf 100644
--- a/ui/file_manager/video_player/video_player.html
+++ b/ui/file_manager/video_player/video_player.html
@@ -19,6 +19,17 @@
   <link rel="import" href="chrome-extension://hhaomjibdihmijegdhdafkllkbggdgoj/foreground/elements/files_icon_button.html">
 
   <style is="custom-style">
+    files-icon-button {
+      --files-ripple: {
+        background-color: black;
+      };
+      --files-toggle-ripple: {
+        background-color: black;
+      };
+      --files-toggle-ripple-activated: {
+        background-color: black;
+      };
+    }
     paper-slider {
       --paper-slider-knob-color: rgb(64, 138, 241);
       --paper-slider-active-color: rgb(66, 133, 244);