diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
index d494c0c9687cd1..401ba092deb421 100644
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -32,6 +32,7 @@
 
 import collections
 import enum
+import functools
 import sys
 import types
 
@@ -1314,6 +1315,7 @@ def winfo_reqwidth(self):
         return self.tk.getint(
             self.tk.call('winfo', 'reqwidth', self._w))
 
+    @functools.lru_cache
     def winfo_rgb(self, color):
         """Return a tuple of integer RGB values in range(65536) for color in this widget."""
         return self._getints(
@@ -1848,6 +1850,15 @@ def __repr__(self):
         return '<%s.%s object %s>' % (
             self.__class__.__module__, self.__class__.__qualname__, self._w)
 
+    def __eq__(self, other):
+        if isinstance(other, Misc):
+            return self._w == other._w
+
+        return False
+
+    def __hash__(self):
+        return hash(self._w)
+
     # Pack methods that apply to the master
     _noarg_ = ['_noarg_']
 
diff --git a/Misc/NEWS.d/next/Library/2025-01-07-05-25-57.gh-issue-128576.qzDkju.rst b/Misc/NEWS.d/next/Library/2025-01-07-05-25-57.gh-issue-128576.qzDkju.rst
new file mode 100644
index 00000000000000..15f6cdca13b8b2
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-01-07-05-25-57.gh-issue-128576.qzDkju.rst
@@ -0,0 +1,2 @@
+Add decorator :func:`functools.lru_cache` to the :mod:`tkinter` method
+:meth:`!winfo_rgb`.