diff --git a/main/scripts/main.js b/main/scripts/main.js
index 4c78f61..d52c200 100644
--- a/main/scripts/main.js
+++ b/main/scripts/main.js
@@ -1,4 +1,5 @@
-const dark = getCookie("dark") === "true";
+const darkCookie = getCookie("dark");
+const dark = darkCookie == undefined ? window.matchMedia("(prefers-color-scheme: dark)").matches : darkCookie == "true";
 if (dark)
     addStyle("/style/dark.css");