Add Ability to Show Ref Color Palette/Swatch when in ACR (or Ps Camera Raw Filter) Color Grading

I want to be able to make at least one palette of 3-5 color swatches visible (like Kuler used to do & like Adobe Color generates) accessible as a pop-out to the Color Grading panel in ACR & the Ps Camera Raw Filter.

I can't figure out a way currently to get my reference colors visible (if I'm trying to color grade to match a look I'm using as inspiration). I'd want to be able to pull the palettes to use as pop-outs from my Library or be able to custom create a palette on the fly by sampling from an image in Ps that can be accessed from inside ACR or Ps Camera Raw Filter's Color Grading panel.

In a best of all worlds functionality scenario, I'd like to be able to use an Eyedropper Tool in the Color Grading Panel (of ACR/Ps Camera Raw Filter) to sample from that pop-out color swatches palette of 3-5 colors (to span shadows, midtones, highlights).

If it's there, could someone pls advise me! I do not use Lr (Classic or otherwise) and would like that functionality for use in my Ps workflow.

The sooner this function could be made available the better for my projects! I'd use it a lot. Thx in advance.