diff --git a/ehyd_tools/data_processing.py b/ehyd_tools/data_processing.py
index 86cab59..3f61f86 100644
--- a/ehyd_tools/data_processing.py
+++ b/ehyd_tools/data_processing.py
@@ -189,7 +189,7 @@ def agg_data_figure(series, availability, agg='sum', freq=None, add_mean_line=Fa
                 bbox={'facecolor': 'white', 'alpha': 0.5, 'pad': 2, 'linewidth': '0'})
         ax.axhline(mean, ls='--', color='darkgray', linewidth=0.7)
 
-    ax.bar(x=index, height=ts_agg.values, color='k')
+    ax.bar(x=index, height=ts_agg.values, color='black')
     ax.set_ylabel('Niederschlag (mm/{})'.format(freq_long[freq]))
     ax.set_xlabel('Zeit')
     # ax.set_xlim(left=ax.get_xlim()[0] - 0.5)