Mail shows an inbox email with a light blue background
In the Menu Bar go to Mail>Preferences>Rules and unselect News from Apple.

You can read more about rules here : https://support.apple.com/guide/mail/use-rules-to-manage-your-inbox-mlhlp1017/mac and about highlighting here : https://support.apple.com/guide/mail/color-code-messages-mlhlp1063/mac