This is a free substance material I made to use for adding color variations quickly to textures in substance painter. You can randomize the 3 colors quite easily and pick the specific colors you wish to use and control the look and feel. I made a quick video demo explaining it in depth: https://www.youtube.com/watch?v=hdBOsyogEVY This works for both metalness AND spec/gloss pbr workflows. Subtle color variation is something every texture needs and I can't tell you how much time I have wasted setting this up time and time again from scratch in a more destructive way in substance painter. So I finally took the time to learn substance designer to create this material which I have wanted for ages. Hope you find it useful... drop me a line, or follow me if you like it so I know it was worth the effort. -Cheers!
-substance painter color mixer material
-Image of substance designer graph
-substance designer project