diff --git a/site/content/tutorial/06-bindings/03-checkbox-inputs/app-a/App.svelte b/site/content/tutorial/06-bindings/03-checkbox-inputs/app-a/App.svelte
index 2847dad485..40c11cc817 100644
--- a/site/content/tutorial/06-bindings/03-checkbox-inputs/app-a/App.svelte
+++ b/site/content/tutorial/06-bindings/03-checkbox-inputs/app-a/App.svelte
@@ -2,6 +2,10 @@
 	let yes = false;
 </script>
 
+<style>
+	button[disabled] { color: #aaa }
+</style>
+
 <label>
 	<input type=checkbox checked={yes}>
 	Yes! Send me regular email spam
@@ -15,4 +19,4 @@
 
 <button disabled={!yes}>
 	Subscribe
-</button>
\ No newline at end of file
+</button>