Hi!Perry Vincent,
Welcome to the Microsoft Community!
I realize that you've encountered a problem with you want to change the color of progress bar and I understand how you feel.
In order to better help you troubleshoot the problem, there are the following questions to check with you:
1.Is the progress bar you are referring to appearing in the e-mail or elsewhere?
2.Based on your description so far, the color of the progress bar has changed recently, right?
If it's convenient, please provide a screenshot so I can better determine the source of the problem.
Thank you for your understanding and patience as I continue to serve you. I hope that your problem will be solved satisfactorily.
Best Regards
Eddy | Microsoft Community Support Specialist