diff --git a/python/prophet/plot.py b/python/prophet/plot.py
index cb923ca..fbd98a9 100644
--- a/python/prophet/plot.py
+++ b/python/prophet/plot.py
@@ -473,7 +473,8 @@ def add_changepoints_to_plot(
 
 
 def plot_cross_validation_metric(
-    df_cv, metric, rolling_window=0.1, ax=None, figsize=(10, 6), color='b'
+    df_cv, metric, rolling_window=0.1, ax=None, figsize=(10, 6), color='b',
+    point_color='gray'
 ):
     """Plot a performance metric vs. forecast horizon from cross validation.
 
@@ -543,7 +544,7 @@ def plot_cross_validation_metric(
     x_plt = df_none['horizon'].astype('timedelta64[ns]').astype(np.int64) / float(dt_conversions[i])
     x_plt_h = df_h['horizon'].astype('timedelta64[ns]').astype(np.int64) / float(dt_conversions[i])
 
-    ax.plot(x_plt, df_none[metric], '.', alpha=0.1, c=color)
+    ax.plot(x_plt, df_none[metric], '.', alpha=0.1, c=point_color)
     ax.plot(x_plt_h, df_h[metric], '-', c=color)
     ax.grid(True)