matplotlib
diff --git a/‎doc/users/whats_new/offset_label_color.rst
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+4Lines changed: 4 additions & 0 deletions b/‎doc/users/whats_new/offset_label_color.rst
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diff --git a/‎lib/matplotlib/axis.py
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+2Lines changed: 2 additions & 0 deletions b/‎lib/matplotlib/axis.py
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diff --git a/‎lib/matplotlib/tests/test_axes.py
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@@ -0,0 +1,4 @@
+Axis offset label now responds to `labelcolor`
+----------------------------------------------
+
+Axis offset labels are now colored the same as axis tick markers when `labelcolor` is altered.
@@ -796,6 +796,8 @@ def set_tick_params(self, which='major', reset=False, **kw):
             if which == 'minor' or which == 'both':
                 for tick in self.minorTicks:
                     tick._apply_params(**self._minor_tick_kw)
+            if 'labelcolor' in kwtrans:
+                self.offsetText.set_color(kwtrans['labelcolor'])
         self.stale = True
 
     @staticmethod
 
@@ -4475,6 +4475,16 @@ def test_axisbelow():
         ax.set_axisbelow(setting)
 
 
+@cleanup
+def test_offset_label_color():
+    # Tests issue 6440
+    fig = plt.figure()
+    ax = fig.add_subplot(1, 1, 1)
+    ax.plot([1.01e9, 1.02e9, 1.03e9])
+    ax.yaxis.set_tick_params(labelcolor='red')
+    assert ax.yaxis.get_offset_text().get_color() == 'red'
+
+
 @cleanup
 def test_large_offset():
     fig, ax = plt.subplots()