diff --git a/noblogsmv/webapp.py b/noblogsmv/webapp.py
index ae015609f67753e80d67c001ec1b84f7cefde327..01b63532c2c51da2fe5f4fbec3441f918f39a0c3 100644
--- a/noblogsmv/webapp.py
+++ b/noblogsmv/webapp.py
@@ -42,7 +42,7 @@ def _mk_stacked_graph(chart, valuelist):
             if v:
                 v0[i] += v
         chart.add_data(v0[:])
-        chart.add_fill_range(_palette[i], j, j+1)
+        chart.add_fill_range(_palette[j], j, j+1)
     chart.set_colours(['000000'] + _palette[:n])