Color ramps with normals, 2.8 Eevee Style See screenshot of my implementation 



In the previous blender versions, I would often create a backlight effect by using a color ramp and normals modifier in the default material settings. 

The idea is to create a backlit effect or in some cases a color-based-on-angle effect that you see in some car paints. 

I believe it is judged relative to the camera, so I have been unable to reproduce this effect in Evee.

How is this implemented?
I found one solution through random experimenting: 

A freznel input feeding into a color ramp. I used constant for my own toon applications, but I suppose this would also work for a smooth effect.