Thanks for coming back to us, @Jeremy S.

In QuickBooks Online (QBO), you can change the color of the Standard template and your Packing slip will follow. The packing slip is a standard format and cannot be edited. However, you can customize invoices, estimates, and sales receipts to make it personalize and add the information that matters most to your business.

In the meantime, I'd encourage checking our QuickBooks Blog from time to time to stay current with the latest feature available in QBO.

You may also check our help articles in case you have any other QuickBooks concerns: Help articles for QuickBooks Online.

Please don't hesitate to get back to me if you have any additional questions about QuickBooks. Have a great day.