code: def test_winfo_rgb(self):
      def assertApprox(col1, col2):
          # A small amount of flexibility is required (bpo-45496)
          # 33 is ~0.05% of 65535, which is a reasonable margin
          for col1_channel, col2_channel in zip(col1, col2):
              self.assertAlmostEqual(
                  col1_channel, col2_channel, delta=33
              )
  
      root = self.root
      rgb = root.winfo_rgb
  
      # Color name.
      self.assertEqual(rgb("red"), (65535, 0, 0))
      self.assertEqual(rgb("dark slate blue"), (18504, 15677, 35723))
      # #RGB - extends each 4-bit hex value to be 16-bit.
      self.assertEqual(rgb("#F0F"), (0xFFFF, 0x0000, 0xFFFF))
      # #RRGGBB - extends each 8-bit hex value to be 16-bit.
      assertApprox(rgb("#4a3c8c"), (0x4A4A, 0x3C3C, 0x8C8C))
      # #RRRRGGGGBBBB
      assertApprox(rgb("#dede14143939"), (0xDEDE, 0x1414, 0x3939))
      # Invalid string.
      with self.assertRaises(tkinter.TclError):
          rgb("#123456789a")
      # RGB triplet is invalid input.
      with self.assertRaises(tkinter.TclError):
          rgb((111, 78, 55))
  
imports: import functools
  import unittest
  import tkinter
  from tkinter import TclError
  import enum
  from test import support
  from test.test_tkinter.support import AbstractTkTest, AbstractDefaultRootTest, requires_tk
label_desc: Use image node_id 12 for calling the MiscTest obj's underlying member method code with example usage: obj.test_winfo_rgb() without return types