Change the color of 3d materials

It's probably better to start a Thread in the Substance community on how to create such a material. You cannot create new materials directly in Illustrator. The Substance subscription is not included in the Creative Cloud package.

https://community.adobe.com/t5/substance-3d-sampler/ct-p/ct-substance-3d-sampler?page=1&sort=latest_replies&lang=all&tabid=all