Support auto for rcParams['axes.labelcolor']

trananso · trananso · commit e4186b7dff7f · 2024-05-13T16:35:42.000-04:00
diff --git a/lib/matplotlib/axis.py b/lib/matplotlib/axis.py
@@ -658,11 +658,16 @@ def __init__(self, axes, *, pickradius=15, clear=True):
 
         self._autolabelpos = True
 
+        if not cbook._str_lower_equal(mpl.rcParams['axes.labelcolor'], 'auto'):
+            color = mpl.rcParams['axes.labelcolor']
+        else:
+            color = mpl.rcParams['text.color']
+
         self.label = mtext.Text(
             np.nan, np.nan,
             fontsize=mpl.rcParams['axes.labelsize'],
             fontweight=mpl.rcParams['axes.labelweight'],
-            color=mpl.rcParams['axes.labelcolor'],
+            color=color
         )
         self._set_artist_props(self.label)
         self.offsetText = mtext.Text(np.nan, np.nan)
@@ -882,7 +887,10 @@ def clear(self):
         self.label._reset_visual_defaults()
         # The above resets the label formatting using text rcParams,
         # so we then update the formatting using axes rcParams
-        self.label.set_color(mpl.rcParams['axes.labelcolor'])
+        if not cbook._str_lower_equal(mpl.rcParams['axes.labelcolor'], 'auto'):
+            self.label.set_color(mpl.rcParams['axes.labelcolor'])
+        else:
+            self.label.set_color(mpl.rcParams['text.color'])
         self.label.set_fontsize(mpl.rcParams['axes.labelsize'])
         self.label.set_fontweight(mpl.rcParams['axes.labelweight'])
         self.offsetText._reset_visual_defaults()
diff --git a/lib/matplotlib/mpl-data/matplotlibrc b/lib/matplotlib/mpl-data/matplotlibrc
@@ -378,7 +378,7 @@
 #axes.labelsize:     medium  # font size of the x and y labels
 #axes.labelpad:      4.0     # space between label and axis
 #axes.labelweight:   normal  # weight of the x and y labels
-#axes.labelcolor:    black
+#axes.labelcolor:    auto
 #axes.axisbelow:     line    # draw axis gridlines and ticks:
                              #     - below patches (True)
                              #     - above patches but below lines ('line')
diff --git a/lib/matplotlib/rcsetup.py b/lib/matplotlib/rcsetup.py
@@ -1101,7 +1101,7 @@ def _convert_validator_spec(key, conv):
     "axes.labelsize":     validate_fontsize,  # fontsize of x & y labels
     "axes.labelpad":      validate_float,  # space between label and axis
     "axes.labelweight":   validate_fontweight,  # fontsize of x & y labels
-    "axes.labelcolor":    validate_color,  # color of axis label
+    "axes.labelcolor":    validate_color_or_auto,  # color of axis label
     # use scientific notation if log10 of the axis range is smaller than the
     # first or larger than the second
     "axes.formatter.limits": _listify_validator(validate_int, n=2),
