Turn off bar outlines 

@@ -32,10 +32,11 @@
     textclr            => '#333333',
     legendclr          => '#333333',
     dclrs              => ['#ff782a', '#6daa3a', '#4d7296'],
+    borderclrs         => [undef],
     y_max_value        => 60,
     y_tick_number      => 3,
     tick_length        => -4,
-    long_ticks         => 1,
+    long_ticks         => 0,
     x_ticks            => 0,
     axis_space         => 6,
     bar_spacing        => 1,