matplotlib · iccir · Jul 22, 2026
diff --git a/lib/matplotlib/backends/_backend_gtk.py b/lib/matplotlib/backends/_backend_gtk.py
@@ -16,7 +16,7 @@
 import gi
 # The GTK3/GTK4 backends will have already called `gi.require_version` to set
 # the desired GTK.
-from gi.repository import Gdk, Gio, GLib, Gtk
+from gi.repository import Gdk, Gio, GLib, Gtk, GdkPixbuf
 
 
 try:
@@ -144,8 +144,11 @@ def __init__(self, canvas, num):
 
         if gtk_ver == 3:
             icon_ext = "png" if sys.platform == "win32" else "svg"
-            self.window.set_icon_from_file(
+            small_icon = GdkPixbuf.Pixbuf.new_from_file(
+                str(cbook._get_data_path(f"images/matplotlib_small.{icon_ext}")))
+            large_icon = GdkPixbuf.Pixbuf.new_from_file(
                 str(cbook._get_data_path(f"images/matplotlib.{icon_ext}")))
+            self.window.set_icon_list([small_icon, large_icon])
 
         self.vbox = Gtk.Box()
         self.vbox.set_property("orientation", Gtk.Orientation.VERTICAL)

diff --git a/lib/matplotlib/backends/_backend_tk.py b/lib/matplotlib/backends/_backend_tk.py
@@ -552,11 +552,11 @@ def create_with_canvas(cls, canvas_class, figure, num):
             # supported Tk version is increased to 8.6, as Tk 8.6+ natively
             # supports PNG images.
             icon_fname = str(cbook._get_data_path(
-                'images/matplotlib.png'))
+                'images/matplotlib_small.png'))
             icon_img = ImageTk.PhotoImage(file=icon_fname, master=window)
 
             icon_fname_large = str(cbook._get_data_path(
-                'images/matplotlib_large.png'))
+                'images/matplotlib.png'))
             icon_img_large = ImageTk.PhotoImage(
                 file=icon_fname_large, master=window)
 

diff --git a/lib/matplotlib/backends/backend_qt.py b/lib/matplotlib/backends/backend_qt.py
@@ -87,6 +87,13 @@
 }
 
 
+def _create_WindowIcon():
+    icon = QtGui.QIcon()
+    icon.addFile(str(cbook._get_data_path('images/matplotlib_small.svg')))
+    icon.addFile(str(cbook._get_data_path('images/matplotlib.svg')))
+    return icon
+
+
 # lru_cache keeps a reference to the QApplication instance, keeping it from
 # being GC'd.
 @functools.lru_cache(1)
@@ -136,9 +143,7 @@ def _create_qApp():
             pass
         app = QtWidgets.QApplication(["matplotlib"])
         if sys.platform == "darwin":
-            image = str(cbook._get_data_path('images/matplotlib.svg'))
-            icon = QtGui.QIcon(image)
-            app.setWindowIcon(icon)
+            app.setWindowIcon(_create_WindowIcon())
         app.setQuitOnLastWindowClosed(True)
         cbook._setup_new_guiapp()
         if qt_version == 5:
@@ -590,9 +595,7 @@ def __init__(self, canvas, num):
         self.window.closing.connect(self._widgetclosed)
 
         if sys.platform != "darwin":
-            image = str(cbook._get_data_path('images/matplotlib.svg'))
-            icon = QtGui.QIcon(image)
-            self.window.setWindowIcon(icon)
+            self.window.setWindowIcon(_create_WindowIcon())
 
         self.window._destroying = False
 
@@ -983,8 +986,7 @@ def set_history_buttons(self):
 class SubplotToolQt(QtWidgets.QDialog):
     def __init__(self, targetfig, parent):
         super().__init__(parent)
-        self.setWindowIcon(QtGui.QIcon(
-            str(cbook._get_data_path("images/matplotlib.png"))))
+        self.setWindowIcon(_create_WindowIcon())
         self.setObjectName("SubplotTool")
         self._spinboxes = {}
         main_layout = QtWidgets.QHBoxLayout()

diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
@@ -1043,7 +1043,7 @@ def _load_bitmap(filename):
 
 def _set_frame_icon(frame):
     bundle = wx.IconBundle()
-    for image in ('matplotlib.png', 'matplotlib_large.png'):
+    for image in ('matplotlib_small.png', 'matplotlib.png'):
         icon = wx.Icon(_load_bitmap(image))
         if not icon.IsOk():
             return

diff --git a/lib/matplotlib/mpl-data/images/back.pdf b/lib/matplotlib/mpl-data/images/back.pdf
diff --git a/lib/matplotlib/mpl-data/images/back.png b/lib/matplotlib/mpl-data/images/back.png
diff --git a/lib/matplotlib/mpl-data/images/back.svg b/lib/matplotlib/mpl-data/images/back.svg
diff --git a/lib/matplotlib/mpl-data/images/back_large.png b/lib/matplotlib/mpl-data/images/back_large.png
diff --git a/lib/matplotlib/mpl-data/images/filesave.pdf b/lib/matplotlib/mpl-data/images/filesave.pdf
diff --git a/lib/matplotlib/mpl-data/images/filesave.png b/lib/matplotlib/mpl-data/images/filesave.png
diff --git a/lib/matplotlib/mpl-data/images/filesave.svg b/lib/matplotlib/mpl-data/images/filesave.svg
diff --git a/lib/matplotlib/mpl-data/images/filesave_large.png b/lib/matplotlib/mpl-data/images/filesave_large.png
diff --git a/lib/matplotlib/mpl-data/images/forward.pdf b/lib/matplotlib/mpl-data/images/forward.pdf
diff --git a/lib/matplotlib/mpl-data/images/forward.png b/lib/matplotlib/mpl-data/images/forward.png
diff --git a/lib/matplotlib/mpl-data/images/forward.svg b/lib/matplotlib/mpl-data/images/forward.svg
diff --git a/lib/matplotlib/mpl-data/images/forward_large.png b/lib/matplotlib/mpl-data/images/forward_large.png
diff --git a/lib/matplotlib/mpl-data/images/help.pdf b/lib/matplotlib/mpl-data/images/help.pdf
diff --git a/lib/matplotlib/mpl-data/images/help.png b/lib/matplotlib/mpl-data/images/help.png
diff --git a/lib/matplotlib/mpl-data/images/help.svg b/lib/matplotlib/mpl-data/images/help.svg
diff --git a/lib/matplotlib/mpl-data/images/help_large.png b/lib/matplotlib/mpl-data/images/help_large.png
diff --git a/lib/matplotlib/mpl-data/images/home.pdf b/lib/matplotlib/mpl-data/images/home.pdf
diff --git a/lib/matplotlib/mpl-data/images/home.png b/lib/matplotlib/mpl-data/images/home.png
diff --git a/lib/matplotlib/mpl-data/images/home.svg b/lib/matplotlib/mpl-data/images/home.svg
diff --git a/lib/matplotlib/mpl-data/images/home_large.png b/lib/matplotlib/mpl-data/images/home_large.png
diff --git a/lib/matplotlib/mpl-data/images/matplotlib.pdf b/lib/matplotlib/mpl-data/images/matplotlib.pdf
diff --git a/lib/matplotlib/mpl-data/images/matplotlib.png b/lib/matplotlib/mpl-data/images/matplotlib.png