Files app: Update color scheme.

ui/file_manager/file_manager/main.html

Index: ui/file_manager/file_manager/main.html
diff --git a/ui/file_manager/file_manager/main.html b/ui/file_manager/file_manager/main.html
index 06db13469361131149b030d2bd1485a55d9de559..66b876cb5f2c43589fb1092838f1f7b035b61e5a 100644
--- a/ui/file_manager/file_manager/main.html
+++ b/ui/file_manager/file_manager/main.html
@@ -52,7 +52,7 @@
           background-color: rgb(207, 207, 207);
         };
         --paper-input-container-underline-focus: {
-          background-color: rgb(33, 150, 243);
+          background-color: rgb(51, 103, 214);
         };
       }