Changing color palette in unity

Hi everyone, Im a newb game designer and i was wondering if you could help me with a script:

Basically, what is a script that can do mathematical calculations on the proximity of objects and based on how close they are to one another, change their hue and saturation of same colors and combine mixed colors and change the color palette of the environment?

Your question is really general and not described in very explicit or meaningful wording/terminology. I will try to answer, but without something more specific to go on, I cannot really go into many specifics.

Also, it's almost like you are asking three or four questions at once. Perhaps you should consider breaking the question into separate parts as per the directions in the FAQ.

Mathematical calculations on the proximity of objects?

This should be in a separate question as it is a separate problem.

How you do this depends entirely on what you mean by mathematical calculations and the setup which you fail to describe.

If you store references to the object Transforms, then you can just go (object1-object2).sqrMagnitude for distance squared or (object1-object2).magnitude or Vector3.Distance(object1-object2) for distance.

If you need to calculate it on the fly and don't have references to your objects, you might use Physics.Raycast.

In certain setups, if you are moving your Transforms by fixed amounts, you may not even need to use such expensive calculations as within some game mechanics, you know how many "spaces" one object is from another and you know the size of a "space".

change their hue and saturation

Depending on your shader, there is likely a main color, accessible through renderer.material.color. Alternatively, you can use GetColor and SetColor.

To change the color values by hue and saturation at run-time, you would need to get the colors, do an HSV conversion or the like and then set the colors to your changed colors.

It's easier however to simply store your colors/values in variables or a texture of some sort rather than calculate them at run-time. If your conversion is simple enough, you really only need to store 2 values and then you can just use Color.Lerp to transition between them.

combine mixed colors?

This seems like a third separate question. What exactly does this mean? You want to change a bunch of different colors and then take the new values and then "combine" them?

What do you mean by "combine"? Add? Multiply? Signed Addition? Divide? Subtract? Alpha Blend?

Where are these colors coming from and where are you combining them? You could add a bunch of colors to a single shader and then let the shader do the work. You could calculate it in a script and apply it to the color of a given shader. It all depends on what you mean exactly.

change the color palette of the environment?

This is either part of the above questions or a separate question, but that depends on what you mean.

The environment? In the context of your description, what is "the environemnt"? Is it one GameObject or several? Is it your skybox?

Color palette? What is your color palette? Is it a shader with several colors? Is it a Texture2D?