How to make dependent materials in Blender?

Question

Blender

Let's make Lego pieces. All parts have the same level of roughness, reflections and so on, but different colors.
Is it possible to make it so that there is a main material and another one is superimposed on it, which only changes the color?

Answer 1

Use node "Object info" , output "Color". This parameter is taken from Viewport Display -> Color, which is set for each object separately. Thus, you will have one material for all objects, the diffuse color of which changes based on the attributes of the object.

you can download an example from the link:
https://drive.google.com/file/d/1V79Ojg_TrFtXxwbp5...

Answer 2

But what if we pack the material into a self-made node with a color as input? Something like this: https://youtu.be/_bxAQM0pnzs