diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
index 9bdae12d6ebf..2ce6610fc0c4 100644
--- a/lib/matplotlib/colors.py
+++ b/lib/matplotlib/colors.py
@@ -1490,6 +1490,7 @@ def inverse(self, value):
     Norm.__name__ = base_norm_cls.__name__
     Norm.__qualname__ = base_norm_cls.__qualname__
     Norm.__module__ = base_norm_cls.__module__
+    Norm.__doc__ = base_norm_cls.__doc__
     Norm.__init__.__signature__ = bound_init_signature.replace(parameters=[
         inspect.Parameter("self", inspect.Parameter.POSITIONAL_OR_KEYWORD),
         *bound_init_signature.parameters.values()])