diff --git a/public/base.html b/public/base.html
index 538b38a..1349e5e 100644
--- a/public/base.html
+++ b/public/base.html
@@ -23,7 +23,7 @@
         <meta name="robots" content="index, follow">
         <meta name="googlebot" content="index, follow">
         <meta name="author" content="Nercone a.k.a. DiamondGotCat">
-        <meta name="theme-color" content="#A9A9A9">
+        <meta name="theme-color" content="#1A1A1A">
         <!-- OGP (Open Graph protocol) -->
         <meta property="og:site_name" content="nercone's website">
         <meta property="og:title" content="{{ self.title() }}">
diff --git a/public/site.webmanifest b/public/site.webmanifest
index 0f02a5d..6eccdfc 100644
--- a/public/site.webmanifest
+++ b/public/site.webmanifest
@@ -3,8 +3,8 @@
     "description": "作りたいものを作り、やりたくないことからは逃げる学生",
     "start_url": "https://nercone.dev/",
     "display": "standalone",
-    "theme_color": "#A9A9A9",
-    "background_color": "#202020",
+    "theme_color": "#1A1A1A",
+    "background_color": "#1A1A1A",
     "icons": [
         {
             "src": "/assets/images/favicon_cat.png",