diff --git a/default_environment/stylesheet/main.css b/default_environment/stylesheet/main.css
index a37f188..a9b257a 100644
--- a/default_environment/stylesheet/main.css
+++ b/default_environment/stylesheet/main.css
@@ -7,6 +7,8 @@
   --stream-divider-color: #6ccff6;
   --stream-post-background-color: #1f1f1f;
 
+  --blog-post-background-color: #1f1f1f;
+
   --src-font-family: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo,
     Consolas, "DejaVu Sans Mono", monospace;
 
@@ -31,6 +33,8 @@
     --stream-divider-color: #933009;
     --stream-post-background-color: #e0e0e0;
 
+    --blog-post-background-color: #e0e0e0;
+
     --src-block-background-color: #ebebeb;
     --src-block-border-color: #7b7d70;
     --src-block-language-color: #f5f5f5;
@@ -94,6 +98,7 @@ body {
   /* A stand-alone blog post (not in a blog stream). */
   .blog_post {
     padding: 1rem 0 3rem 0;
+    background: var(--blog-post-background-color);
   }
 
   .blog_stream {