Fix broadcast message colors to one displayed in preview

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/admin/broadcast_messages/index.html.haml

@@ -22,11 +22,11 @@
   .form-group.js-toggle-colors-container.hide
     = f.label :color, "Background Color", class: 'control-label'
     .col-sm-10
-      = f.color_field :color, value: "#AA33EE", class: "form-control"
+      = f.color_field :color, value: "#eb9532", class: "form-control"
   .form-group.js-toggle-colors-container.hide
     = f.label :font, "Font Color", class: 'control-label'
     .col-sm-10
-      = f.color_field :font, value: "#224466", class: "form-control"
+      = f.color_field :font, value: "#FFFFFF", class: "form-control"
   .form-group
     = f.label :starts_at, class: 'control-label'
     .col-sm-10.datetime-controls