Get changing light color of sun in sky.js shader?

I’m wondering how to retrieve the current “color” of the sun light at any given setting for the three.js sky.js library.

I’m also looking to resize/replace the sun disk.
How can I get those glsl “variables?” To JavaScript variables then back in?

Setting additional uniforms for them? I’m learning about glsl and would like to know how.

I see where the “sun disc” and some “color” floats at the bottom of the glsl code are.

I’ve got the sun vector3 being used for a directional light properly. Now I want to change the light’s color and intensity according to the shader’s sun light.

Also resize/replace the disc with an optional moon, and retrieve ambient color to feed into the sky arg of my hemisphere light.

Any pointers would be great.