diff --git a/lib/partials/layout.hbs b/lib/partials/layout.hbs
index d75f97a..b1a3d2a 100644
--- a/lib/partials/layout.hbs
+++ b/lib/partials/layout.hbs
@@ -8,6 +8,7 @@
 
     <meta name="description" content="Regular expression visualizer using railroad diagrams" />
     <meta name="viewport" content="width=device-width" />
+    <meta name="theme-color" content="#bada55" />
 
     <link rel="shortcut icon" href="/favicon.ico" />
     <link rel="author" href="humans.txt" />