Is it possible to randomize color of separated meshes inside 1 object? Is it possible to use some kind of randomizer to randomize parameters of the seprate meshes inside one object? Please see attached picture. On the left there are bunch of cubes. On the right there are bunch of cubes that are combined in one object. I want my right cubes, to get random colors based on fact they are separate meshes.

Is that possible? Maybe there is some paid plugin or addon?
You can write a script to color each mesh with different vertex color.
You can scale each mesh in UV space into a point S0 (by script if there are lots of meshes) and generate random colors using noise texture: