Hey,
We would like to inform you that the changes you want to made can be done through the default page. For this, you have to edit Email Notification to the default after which the color of the footer will be change in the default Pabbly Subscription Billing email templates.
Settings >> Email Notification >> Edit (Click on 3 dots given on right side of the mail you want to det default) >> Reset to Default.
Hope the above information helps you.
If you need further support please reach out to us.
Regards,
Vipin Mishra