diff --git a/domainlab/utils/generate_benchmark_plots.py b/domainlab/utils/generate_benchmark_plots.py
index 9c0be5fae..e031e8314 100644
--- a/domainlab/utils/generate_benchmark_plots.py
+++ b/domainlab/utils/generate_benchmark_plots.py
@@ -538,6 +538,7 @@ def boxplot_stochastic(dataframe_in, obj, file=None):
                 x=COLNAME_IDX_PARAM,
                 y=obj,
                 legend=False,
+                color="black",
                 ax=axes[num],
             )
             # remove legend, set ylim, set x-label and remove y-label