diff --git a/docs/examples/css-style.md b/docs/examples/css-style.md
index 9713bd31..ef8ce05d 100644
--- a/docs/examples/css-style.md
+++ b/docs/examples/css-style.md
@@ -38,6 +38,7 @@ const grid = new Grid({
     },
     td: {
       'text-align': 'center'
+      'background-color': 'rgba(0, 0, 0, 0.1)',
     }
   }
 });