I used a tan and army green color. White and black work great too. 

Here are a few links to 3d print supplies I like to use. Not necessarily for this file but useful for the average 3d printer

This is the putty I use for wall hanging

https://amzn.to/3BzS0Bl

Glue for multipiece models

https://amzn.to/4eTHqDH

Hair spray for print bed adhesion

https://amzn.to/4es5aPp

Scrapper for removal

https://amzn.to/3Bt1SwO

***NEW TO 3D PRINTING? PLEASE READ BELOW.***

If you have an adhesion issue (your print not sticking to the bed), it's not the file.

You need to recalibrate or clean your bed.

This file has been tested multiple times on multiple printers.

Don't hesitate to reach out, I'm happy to help