Bug summary

I noticed in a screenshot from another PR that out of the six backends displayed, only the Qt5Agg icon fails to adapt to dark mode. It remains black and blends in with the background, making it difficult to distinguish.

#30554 (comment)

I believe the issue lies in the following code:

if self.palette().color(self.backgroundRole()).value() < 128:
    icon_color = self.palette().color(self.foregroundRole())
    mask = pm.createMaskFromColor(
        QtGui.QColor('black'),
        QtCore.Qt.MaskMode.MaskOutColor)
    pm.fill(icon_color)
    pm.setMask(mask)

It appears the icon is rendered as black regardless of whether the if condition is met. This is likely caused by the line mask = pm.createMaskFromColor(QtGui.QColor('black'), QtCore.Qt.MaskMode.MaskOutColor).

Code for reproduction

import matplotlib
import matplotlib.pyplot as plt
matplotlib.use('Qt5Agg')
fig, ax = plt.subplots(subplot_kw = {"projection" : "3d"})
ax.bar3d([1, 1, 2, 2], [1, 2, 1, 2], 0, 1, 1, [2, 3, 1, 4], axlim_clip=True)
plt.show()

Actual outcome

Expected outcome

Additional information

No response

Operating system

MacOS

Matplotlib Version

3.11.0

Matplotlib Backend

Qt5Agg

Python version

No response

Jupyter version

No response

Installation

None