Link url routes and themes

source/index.html.erb

@@ -5,6 +5,6 @@ title: Slack Themes
 <% themes.each do |theme| %>
 <label class="radio theme_label theme_<%= theme.slug %>">
     <img src="/images/theme/<%= theme.slug %>-<%= theme.digest %>.png" class="theme_thumb"><br>
-    <input name="sidebar_theme_rd" type="radio" value="<%= theme.colors %>" ng-model="theme" ng-change="setTheme()"> <%= theme.name %>
+    <input name="sidebar_theme_rd" type="radio" value="<%= theme.slug %>" ng-model="slug"> <%= theme.name %>
 </label>
 <% end %>