gradient for the current week

app/templates/index.html

@@ -2,6 +2,16 @@
 {% block head %}
 <link rel="alternate" type="application/atom+xml" title="{{ settings.SITENAME }}" href="/atom.xml" />
 <title>{{ settings.SITENAME }}</title>
+{% if week_background %}
+<style>
+body {
+    background: {{ week_background }};
+}
+</style>
+<script>
+    window.useHue = true;
+</script>
+{% endif  %}
 {% endblock %}
 {% block content %}
     <div class="index">