diff --git a/src/web/app/base.styl b/src/web/app/base.styl
index 9fdb39a16c..81c039f0a3 100644
--- a/src/web/app/base.styl
+++ b/src/web/app/base.styl
@@ -30,14 +30,7 @@ html
 			cursor progress !important
 
 #error
-	position fixed
-	z-index 32768
-	top 0
-	left 0
-	width 100%
-	height 100%
 	padding 32px
-	background #1269e2
 	color #fff
 
 	hr
diff --git a/src/web/app/init.js b/src/web/app/init.js
index 825bbc77eb..44391b8fcb 100644
--- a/src/web/app/init.js
+++ b/src/web/app/init.js
@@ -175,6 +175,7 @@ function panic(e) {
 	console.error(e);
 
 	// Display blue screen
+	document.documentElement.style.background = '#1269e2';
 	document.body.innerHTML =
 		'<div id="error">'
 			+ '<h1>:( 致命的な問題が発生しました。</h1>'