If you would like to convert your existing color art to greyscale for your application, here is a tutorial on how to achieve this effect in Clip Studio Paint, though the technique should work across a variety other programs, as well.

docs.google.com/document/d/1...

If you're unsure if your application is within the requirements at the time of submission, double-check the response copy sent to your e-mail! There will be time to edit your application before the deadline (Dec.5)!