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coloring Email received in MAIL Mac OS X

I am using MAIL version 13.0 on OS X version 10.15.3.
In the past (previous used version)Example of colored Email in the Inbox, I was able to color the back ground of the Email coming in my InBox with different colors.
I can still see the one that was colored in the past, but I could not find a way to color them with this version.
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IT Manager
Distinguished Expert 2019
  1. Open a folder or smart folder containing the desired message.
  2. Click the message whose background color you want to change.
  3. Select Show Colors under the Format menu or press the keyboard shortcut: Shift+Command+C.

Source: https://www.lifewire.com/highlight-background-color-email-os-x-1172877


Thank you very much.
I have posted another question that you might be able to answer easily:
MAC OS X Mail, Discrepancy between the SMTP list in Mail preference, and in Mail new Email edit From: