Colorshift Material using Principled Shader

I’m trying to figure out how I would go about creating a material like this:

I think I need to try something with the specularity but I’m not sure.

To achieve the actual colour shift effect - you just need to plug a layer weight node into a colour ramp node - then plug the colour ramp into the colour slot of the principled shader.

This thread may give you some ideas - although most posts in this thread were long before the principled shader came out.

Thanks! I’ll take a look at that thread.

I figured it out. I just copied this node setup and replaced the Fresnel, Glossy, and Diffuse shaders with only the principled shader.