Skip validation if color is 'auto'

griverat · griverat · commit 87e8ea65db1e · 2020-07-12T13:58:42.000-05:00
diff --git a/lib/matplotlib/lines.py b/lib/matplotlib/lines.py
@@ -1040,7 +1040,7 @@ def set_color(self, color):
         ----------
         color : color
         """
-        if not is_color_like(color):
+        if not is_color_like(color) and color != 'auto':
             cbook._check_in_list(get_named_colors_mapping(),
                                  _print_supported_values=False, color=color)
         self._color = color
