diff --git a/contrib/static/krane.css b/contrib/static/krane.css
index 3cbfcbe..a4a6f79 100644
--- a/contrib/static/krane.css
+++ b/contrib/static/krane.css
@@ -530,6 +530,6 @@ background-repeat: repeat;
 }
 
 .bumplock {
-    background: red;
+    background-image: url('/static/sage.png');
     filter: saturate(0.15);
 }
diff --git a/contrib/static/sage.png b/contrib/static/sage.png
new file mode 100644
index 0000000..93f3dd2
Binary files /dev/null and b/contrib/static/sage.png differ