diff --git a/addons/web/static/src/css/base.css b/addons/web/static/src/css/base.css
index 1f4f8c2ddd2..82230667e3a 100644
--- a/addons/web/static/src/css/base.css
+++ b/addons/web/static/src/css/base.css
@@ -2096,6 +2096,14 @@
   color: #333333;
 }
 
+.openerp.kitten-mode-activated {
+  background-image: url(http://placekitten.com/g/1365/769);
+  background-size: cover;
+}
+.openerp.kitten-mode-activated > * {
+  opacity: 0.65;
+}
+
 .openerp .oe_form_field_many2one td:first-child {
   position: relative;
 }
diff --git a/addons/web/static/src/css/base.sass b/addons/web/static/src/css/base.sass
index aa77aca7287..cf025bd03d4 100644
--- a/addons/web/static/src/css/base.sass
+++ b/addons/web/static/src/css/base.sass
@@ -1727,6 +1727,12 @@ $colour4: #8a89ba
         color: #333
     // }}}
 
+.openerp.kitten-mode-activated
+    background-image: url(http://placekitten.com/g/1365/769)
+    background-size: cover
+    >*
+        opacity: 0.65
+
 // Transitional overrides for old styles {{{
 .openerp
     .oe_form_field_many2one