Allow printing background

themes/cookbook/layouts/_default/baseof.print.html

@@ -82,6 +82,9 @@
        url('../../fonts/nunito-v16-latin-700italic.woff2') format('woff2'), /* Chrome 26+, Opera 23+, Firefox 39+ */
        url('../../fonts/nunito-v16-latin-700italic.woff') format('woff'); /* Chrome 6+, Firefox 3.6+, IE 9+, Safari 5.1+ */
 }
+
+  html { -webkit-print-color-adjust: exact; }
+
   body {
     font-family: 'Nunito';
   }