diff --git a/src/config.ts b/src/config.ts
index 7a2db10..955bcc4 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -68,6 +68,7 @@ const defaultConfig: FullConfig = {
     },
     contextOptions: {
       viewport: null,
+      colorScheme: 'dark',
     },
   },
   network: {