Backport PR #12581: Fix hist() error message

jklymak · MeeseeksDev[bot] · commit bfc3bd10b041 · 2018-10-22T19:37:37.000Z
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -6550,7 +6550,7 @@ def hist(self, x, bins=None, range=None, density=None, weights=None,
             if len(color) != nx:
                 error_message = (
                     "color kwarg must have one color per data set. %d data "
-                    "sets and %d colors were provided" % (len(color), nx))
+                    "sets and %d colors were provided" % (nx, len(color)))
                 raise ValueError(error_message)
 
         # If bins are not specified either explicitly or via range,
