diff --git a/lib/matplotlib/backends/backend_pdf.py b/lib/matplotlib/backends/backend_pdf.py
index e14aadcb48bd..ccb84c8d4ce9 100644
--- a/lib/matplotlib/backends/backend_pdf.py
+++ b/lib/matplotlib/backends/backend_pdf.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# -*- coding: utf-8 -*-
"""
A PDF matplotlib backend
@@ -1625,6 +1625,8 @@ def check_gc(self, gc, fillcolor=None):
gc._fillcolor = fillcolor
orig_alphas = getattr(gc, '_effective_alphas', (1.0, 1.0))
+ if gc.get_rgb() is None:
+ gc.set_foreground([0.0, 0.0, 0.0, 1.0])
if gc._forced_alpha:
gc._effective_alphas = (gc._alpha, gc._alpha)
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