Hi @VanessaS28. There's a bit more information that we'll need to assist you:
What app are you using to view the email - as in when you check the test / live sendout, are you using the Gmail App, Apple Mail app, Outlook app, etc.?
Are you using dark mode? Is the background something that would be actually seen with the very thin sliver that most email apps let through when displaying the email?
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