diff --git a/packages/web/public/favicon.ico b/packages/web/public/favicon.ico
index a11777c..99cefdb 100644
Binary files a/packages/web/public/favicon.ico and b/packages/web/public/favicon.ico differ
diff --git a/packages/web/public/index.html b/packages/web/public/index.html
index 12354fe..e6a01fa 100644
--- a/packages/web/public/index.html
+++ b/packages/web/public/index.html
@@ -2,9 +2,13 @@
 <html lang="en">
     <head>
         <meta charset="utf-8" />
-        <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
-        <meta name="viewport" content="width=device-width, initial-scale=1" />
-        <meta name="theme-color" content="#000000" />
+        <link rel="icon" href="%PUBLIC_URL%/logo512.png" type="image/png" />
+        <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />
+        <meta
+            name="viewport"
+            content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"
+        />
+        <meta name="theme-color" content="#453e3d" />
         <meta name="description" content="Web site created using create-react-app" />
         <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
         <!--
@@ -53,6 +57,15 @@
                 s.parentNode.insertBefore(tk, s);
             })(document);
         </script>
+        <style>
+            body {
+                font-family: 'source-han-sans-japanese', 'Source Sans Pro', sans-serif,
+                    'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol' !important;
+                color: #f2efef;
+                background-color: #453e3d;
+                margin: 0;
+            }
+        </style>
     </head>
     <body>
         <noscript>You need to enable JavaScript to run this app.</noscript>
diff --git a/packages/web/public/logo192.png b/packages/web/public/logo192.png
index fc44b0a..2207739 100644
Binary files a/packages/web/public/logo192.png and b/packages/web/public/logo192.png differ
diff --git a/packages/web/public/logo512.png b/packages/web/public/logo512.png
index a4e47a6..dbbdfd1 100644
Binary files a/packages/web/public/logo512.png and b/packages/web/public/logo512.png differ
diff --git a/packages/web/public/manifest.json b/packages/web/public/manifest.json
index f01493f..9d4377b 100644
--- a/packages/web/public/manifest.json
+++ b/packages/web/public/manifest.json
@@ -21,5 +21,5 @@
     "start_url": ".",
     "display": "standalone",
     "theme_color": "#000000",
-    "background_color": "#ffffff"
+    "background_color": "#453e3d"
 }
