diff --git a/lib/matplotlib/colors.py b/lib/matplotlib/colors.py
index 5441b0d617b5..f8a18443c9e0 100644
--- a/lib/matplotlib/colors.py
+++ b/lib/matplotlib/colors.py
@@ -706,8 +706,12 @@ def __call__(self, X, alpha=None, bytes=False):
if not self._isinit:
self._init()
- mask_bad = X.mask if np.ma.is_masked(X) else np.isnan(X) # Mask nan's.
+ # Take the bad mask from a masked array, or in all other cases defer
+ # np.isnan() to after we have converted to an array.
+ mask_bad = X.mask if np.ma.is_masked(X) else None
xa = np.array(X, copy=True)
+ if mask_bad is None:
+ mask_bad = np.isnan(xa)
if not xa.dtype.isnative:
xa = xa.byteswap().newbyteorder() # Native byteorder is faster.
if xa.dtype.kind == "f":
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