How to blend this armband with the rest of the tattoo?

[Alex1993]

Hey. 

I have this on my hand and I want to blend it with the rest of the tattoo. There will be some more tattoos in the white bits above it but I need an idea on how I can merge the armband with the rest through a background or something. And also I'd like to have some sort of an ending on my forearm. I was thinking of a mandala design but not sure. Some gradient from the armband down into the mandala tattoo.

If you have any suggestions please let me know. 

https://imgur.com/a/AICbRo1

[SStu]

Instead of "hand", do you mean "wrist"? Are you looking to fill the forearm sleeve?