diff --git a/themes/zenn/sass/_config_dark.scss b/themes/zenn/sass/_config_dark.scss
index eedec6a..977f999 100644
--- a/themes/zenn/sass/_config_dark.scss
+++ b/themes/zenn/sass/_config_dark.scss
@@ -8,7 +8,7 @@ $color-text-muted: darken($color-text, 25%);
 $color-main-bg: #141516;
 $color-main-bg-alt: darken($color-main-bg, 2%);
 $color-main-border: darken($color-main-bg, 5%);
-$color-header: #CF2B07;
+$color-header: #6666cc;
 $color-link: #6699cc;
 $color-link-hover: lighten($color-link, 15%);
 $color-code-bg: $color-main-bg-alt;