diff --git a/example/topics/new-features.mdx b/example/topics/new-features.mdx
index 09a9400..b40cc1e 100644
--- a/example/topics/new-features.mdx
+++ b/example/topics/new-features.mdx
@@ -6,8 +6,10 @@ export default Section
 
 ---
 > Hello World
-> 
+>
 > -- <cite>Dustin Schau</cite>
+
+[Link to Gatsby](//www.gatsbyjs.org)
 ---
 
 ## List items
diff --git a/src/gatsby-mdx-theme.js b/src/gatsby-mdx-theme.js
index ed33618..711281b 100644
--- a/src/gatsby-mdx-theme.js
+++ b/src/gatsby-mdx-theme.js
@@ -13,7 +13,7 @@ export default {
   transitionTimingFunction: 'linear',
   transitionDuration: '0s',
   colors: {
-    background: 'white',
+    ...theme.colors,
     heading: colors.gatsby
   },
   blockquote: {