Controlling color parameter with Expressions

[Immanuel Morales]

make a null object, name it “controller”.
in effects and presets, apply and instance of “color control” to the null.
finally, use the following expression on any of the shapes’ colors.

thisComp.layer("controller").effect("Color Control")("Color");

[Yasush Azush]

Hi,
Thanks for the hint. I was wondering if this controls all the other layers in different comps as well?
Here is what I need to do.

I have different comps with different text layers which I have applied color overlay to them and need to link the color value to one color controller.

I manage to do it in one comp but other comps wont work.

Thanks