Can't get MS Word's 'HighlightColor' via pywin32 (win32com)

Question

Python=3.9.6 / pywin32=301 / MS Word ver 2202 build 16.0.14931.20116

The MS document says that 'HighlightColor' can be set through Word.Font.highlighColor attribute, but I get AttributeError.

import win32com.client as win32

word = win32.gencache.EnsureDispatch("Word.application")
word.Visible = True
doc = word.Documents.Open(r"C:\Users\je\wordcolor\test.docx")
doc = word.ActiveDocument

para = doc.Paragraphs(1) # First paragraph
word.Selection.Start = para.Range.Start
word.Selection.End   = para.Range.End

# Getting current highlight color
print(word.Selection.Font.highlightColor) # THIS LINE INVOKES ATTRIBUTE ERROR

# Traceback (most recent call last):
#   File "C:\Users\je\wordcolor\test.py", line 13, in <module>
#     print(word.Selection.Font.highlightColor)
#   File "C:\Users\je\AppData\Local\Programs\Python\Python39\lib\site-packages\win32com\client\__init__.py", line 524, in __getattr__
#     if d is not None: return getattr(d, attr)
#   File "C:\Users\je\AppData\Local\Programs\Python\Python39\lib\site-packages\win32com\client\__init__.py", line 484, in __getattr__
#     raise AttributeError("'%s' object has no attribute '%s'" % (repr(self), attr))
# AttributeError: '<win32com.gen_py.Microsoft Word 16.0 Object Library._Font instance at 0x2643474563520>' object has no attribute 'highlightColor'

I also tried HighlightColor instead but was the same. It has no response if I set it.

On the other hand

There are discrepancies between the document and pywin32. For example, it says it is Font.color to get/set font color but I actually need to have Font.Color (that's why I also tried HighlightColor). Furthermore, for a color argument, an integer is required while it says a hex string should be passed. How can I notice those differences?