diff --git a/borlander/sites/github.com/styles.css b/borlander/sites/github.com/styles.css
index f0db530..4725070 100644
--- a/borlander/sites/github.com/styles.css
+++ b/borlander/sites/github.com/styles.css
@@ -10,4 +10,14 @@
 
 .ContributionCalendar-label {
     color: #FFFF4E !important;
+}
+
+[data-color-mode=dark][data-dark-theme=dark],
+[data-color-mode=auto][data-light-theme=dark] {
+    --bgColor-default: #0000A4 !important;
+    --bgColor-inset: #000080 !important;
+    --borderColor-default: #6FC3DF !important;
+    --fgColor-accent: #FFFF4E !important;
+    --fgColor-muted: #91b2dc !important;
+    --borderColor-muted: #3d3d84 !important;
 }
\ No newline at end of file
diff --git a/readme.md b/readme.md
index 3a2fe73..da8102d 100644
--- a/readme.md
+++ b/readme.md
@@ -16,6 +16,7 @@ The registry lives in `borlander/themes.json` and is loaded by both `content.js`
 If you add/remove site themes in `borlander/sites/`, re-generate the registry:
 
 ```fish
+
 node borlander/scripts/generate-themes.mjs
 ```