diff --git a/MBB.py b/MBB.py
index 4111208d8963b36ce2b7c224a9af4992af6142c3..9be5f133c5159289e7c261365cbb59c5b8c3deee 100755
--- a/MBB.py
+++ b/MBB.py
@@ -1527,8 +1527,9 @@ def get_overview_plot(data, outpath,scrutiny="base"):
 
     fig, axs = plt.subplots(nrows=2, ncols=2, figsize=(16, 9))  #
 
-    # colors = ['#228833', '#66ccee', '#ee6677', '#aa3377', '#ccbb44', '#bbbbbb']
-    colors = ['#6699CC', '#EECC66', '#004488', '#997700', '#BBBBBB', '#000000']
+    colors = ['#228833', '#66ccee', '#ee6677', '#aa3377', '#ccbb44', '#bbbbbb']
+    # optimized for grayscale:
+    #colors = ['#6699CC', '#EECC66', '#004488', '#997700', '#BBBBBB', '#000000']
 
     ((ax1, ax2), (ax3, ax4)) = axs
     df_p2p[["TP", "TN", "FP", "FN", "RE", "CE"]].plot.barh(stacked=True, ax=ax1, legend=False, color=colors)