diff --git a/README.rst b/README.rst
index 89d3259..29fddaf 100644
--- a/README.rst
+++ b/README.rst
@@ -1,3 +1,6 @@
-# Kujiu's labs
+Kujiu's labs
+============
 
 Source of http://www.kujiu.org blog.
+
+Color for icons: #92b8e0
diff --git a/source/conf.py b/source/conf.py
index a70e6d3..b267a1c 100644
--- a/source/conf.py
+++ b/source/conf.py
@@ -263,7 +263,8 @@ epub_exclude_files = [
    'blog/2024.xhtml',
    'google82f190054a773ed9.xhtml',
 ]
-epub_theme = 'epub'
+epub_theme = 'nervproject'
+epub_theme_options = html_theme_options
 epub_show_urls = 'footnote'
 
 diag_antialias = True