Help Can I get a water bulge effect on Rope

[harut]

I've managed to create the bulges, but I can't change the particle color like in your Gif

I'm setting the color from here

Code:

_rope.solver.colors[solverIndex] = color;

but it dose not have any effect on rope color.

What material do you use, I'm using RedRope + ObiRopeExtrudedRenderer.