Colouring a certain part of a material.

Hey guys,

I’m currently working on a project and I’m looking to have very simplified/block colour assets. I’m using assets from the store and just looking to change the used materials for them to something with little detail.

In the photo is a material I’m looking to make for a flower, and I’m wondering if there’s a way to colour one part of the material red (the flower head front and centre of the photo) and the rest green.